| Game Date | Day | Opp | Lg | H/A | D/N | G | W/L | Result | Inn | Boxscores | Strk | Record | Div-Rk | Lg-Rk | MLB-Rk | Time | Att | Ballpark | Starting Pitcher | Opponent Pitcher | Winning Pitcher | Losing Pitcher | Save Pitcher |
| 2003-03-31 | Mon | LAN | NL | H | D | 1 | L | 0-8 | 9 | box - pbp | L1 | 0-1 | 3 | 14 | 18 | 2:51 | 47,356 | Chase Field | Randy Johnson | Hideo Nomo (R) | Hideo Nomo | Randy Johnson | None |
| Game Date | Day | Opp | Lg | H/A | D/N | G | W/L | Result | Inn | Boxscores | Strk | Record | Div-Rk | Lg-Rk | MLB-Rk | Time | Att | Ballpark | Starting Pitcher | Opponent Pitcher | Winning Pitcher | Losing Pitcher | Save Pitcher |
| 2003-04-01 | Tue | LAN | NL | H | N | 2 | W | 5-4 | 10 | box - pbp | W1 | 1-1 | 2 | 8 | 18 | 2:51 | 35,979 | Chase Field | Curt Schilling | Odalis Perez (L) | Matt Mantei | Paul Shuey | None |
| 2003-04-02 | Wed | LAN | NL | H | N | 3 | L | 0-5 | 9 | box - pbp | L1 | 1-2 | 3 | 10 | 19 | 2:33 | 30,374 | Chase Field | Elmer Dessens | Kevin Brown (R) | Kevin Brown | Elmer Dessens | None |
| 2003-04-04 | Fri | COL | NL | A | D | 4 | L | 1-2 | 9 | box - pbp | L2 | 1-3 | 5 | 12 | 22 | 2:13 | 48,087 | Coors Field | Byung-Hyun Kim | Shawn Chacon (R) | Shawn Chacon | Byung-Hyun Kim | Jose Jimenez |
| 2003-04-05 | Sat | COL | NL | A | D | 5 | L | 3-4 | 10 | box - pbp | L3 | 1-4 | 5 | 13 | 28 | 3:08 | 25,197 | Coors Field | Randy Johnson | Darren Oliver (L) | Steve Reed | Miguel Batista | None |
| 2003-04-06 | Sun | COL | NL | A | D | 6 | L | 3-8 | 9 | box - pbp | L4 | 1-5 | 5 | 15 | 28 | 2:50 | 25,443 | Coors Field | Curt Schilling | Jason Jennings (R) | Jason Jennings | Curt Schilling | None |
| 2003-04-07 | Mon | LAN | NL | A | D | 7 | W | 6-4 | 12 | box - pbp | W1 | 2-5 | 5 | 14 | 28 | 3:54 | 53,819 | Dodger Stadium | Elmer Dessens | Kevin Brown (R) | Matt Mantei | Andy Ashby | Scott Service |
| 2003-04-08 | Tue | LAN | NL | A | N | 8 | L | 3-5 | 9 | box - pbp | L1 | 2-6 | 5 | 14 | 28 | 2:52 | 30,341 | Dodger Stadium | Oscar Villarreal | Kazuhisa Ishii (L) | Paul Shuey | Miguel Batista | Eric Gagne |
| 2003-04-09 | Wed | LAN | NL | A | D | 9 | L | 2-5 | 9 | box - pbp | L2 | 2-7 | 5 | 16 | 29 | 2:58 | 25,764 | Dodger Stadium | Byung-Hyun Kim | Darren Dreifort (R) | Darren Dreifort | Byung-Hyun Kim | Eric Gagne |
| 2003-04-11 | Fri | MIL | NL | H | N | 10 | L | 7-11 | 9 | box - pbp | L3 | 2-8 | 5 | 16 | 29 | 2:46 | 31,958 | Chase Field | Randy Johnson | Wayne Franklin (L) | Wayne Franklin | Randy Johnson | None |
| 2003-04-12 | Sat | MIL | NL | H | N | 11 | L | 2-3 | 9 | box - pbp | L4 | 2-9 | 5 | 16 | 29 | 3:06 | 36,835 | Chase Field | Curt Schilling | Matt Kinney (R) | Matt Kinney | Curt Schilling | Mike DeJean |
| 2003-04-13 | Sun | MIL | NL | H | D | 12 | W | 9-3 | 9 | box - pbp | W1 | 3-9 | 5 | 16 | 29 | 2:41 | 34,416 | Chase Field | Elmer Dessens | Glendon Rusch (L) | Elmer Dessens | Glendon Rusch | None |
| 2003-04-14 | Mon | COL | NL | H | N | 13 | L | 3-5 | 9 | box - pbp | L1 | 3-10 | 5 | 16 | 29 | 3:15 | 25,688 | Chase Field | Byung-Hyun Kim | Nelson Cruz (R) | Nelson Cruz | Byung-Hyun Kim | Jose Jimenez |
| 2003-04-15 | Tue | COL | NL | H | N | 14 | L | 1-12 | 9 | box - pbp | L2 | 3-11 | 5 | 16 | 29 | 3:13 | 31,182 | Chase Field | John Patterson | Shawn Chacon (R) | Shawn Chacon | John Patterson | None |
| 2003-04-16 | Wed | COL | NL | H | N | 15 | W | 4-3 | 9 | box - pbp | W1 | 4-11 | 5 | 16 | 29 | 2:53 | 28,588 | Chase Field | Miguel Batista | Darren Oliver (L) | Matt Mantei | Jose Jimenez | None |
| 2003-04-17 | Thu | COL | NL | H | D | 16 | W | 11-2 | 9 | box - pbp | W2 | 5-11 | 5 | 16 | 29 | 2:20 | 32,507 | Chase Field | Curt Schilling | Jason Jennings (R) | Curt Schilling | Jason Jennings | None |
| 2003-04-18 | Fri | SLN | NL | A | N | 17 | L | 3-6 | 9 | box - pbp | L1 | 5-12 | 5 | 16 | 29 | 3:04 | 36,239 | Busch Stadium II | Elmer Dessens | Woody Williams (R) | Woody Williams | Elmer Dessens | None |
| 2003-04-19 | Sat | SLN | NL | A | D | 18 | W | 4-3 | 9 | box - pbp | W1 | 6-12 | 5 | 15 | 26 | 3:03 | 38,742 | Busch Stadium II | Byung-Hyun Kim | Jason Simontacchi (R) | Byung-Hyun Kim | Jason Simontacchi | Matt Mantei |
| 2003-04-20 | Sun | SLN | NL | A | D | 19 | W | 1-0 | 9 | box - pbp | W2 | 7-12 | 4 | 15 | 25 | 2:55 | 26,152 | Busch Stadium II | Miguel Batista | Brett Tomko (R) | Oscar Villarreal | Brett Tomko | Matt Mantei |
| 2003-04-22 | Tue | MON | NL | A | N | 20 | L | 0-4 | 9 | box - pbp | L1 | 7-13 | 4 | 15 | 27 | 2:38 | 36,879 | Olympic Stadium | Andrew Good | Tomo Ohka (R) | Tomo Ohka | Andrew Good | None |
| 2003-04-23 | Wed | MON | NL | A | N | 21 | W | 6-2 | 9 | box - pbp | W1 | 8-13 | 4 | 15 | 26 | 2:53 | 6,380 | Olympic Stadium | Elmer Dessens | Livan Hernandez (R) | Elmer Dessens | Livan Hernandez | None |
| 2003-04-24 | Thu | MON | NL | A | N | 22 | L | 0-1 | 9 | box - pbp | L1 | 8-14 | 5 | 16 | 27 | 2:30 | 5,954 | Olympic Stadium | Byung-Hyun Kim | Javier Vazquez (R) | Javier Vazquez | Byung-Hyun Kim | Rocky Biddle |
| 2003-04-25 | Fri | NYN | NL | A | N | 23 | L | 3-4 | 9 | box - pbp | L2 | 8-15 | 5 | 16 | 28 | 2:53 | 24,725 | Shea Stadium | Miguel Batista | Steve Trachsel (R) | Mike Stanton | Oscar Villarreal | Armando Benitez |
| 2003-04-27 | Sun | NYN | NL | A | D | 24 | W | 6-1 | 9 | box - pbp | W1 | 10-15 | 4 | 14 | 25 | 2:27 | 36,491 | Shea Stadium | Brandon Webb | Tom Glavine (L) | Brandon Webb | Tom Glavine | None |
| 2003-04-27 | Sun | NYN | NL | A | N | 25 | W | 7-3 | 9 | box - pbp | W2 | 10-15 | 4 | 14 | 25 | 2:58 | 36,491 | Shea Stadium | Randy Johnson | Jae-weong Seo (R) | Randy Johnson | Jae Weong Seo | Matt Mantei |
| 2003-04-28 | Mon | FLO | NL | H | N | 26 | W | 7-1 | 9 | box - pbp | W3 | 11-15 | 4 | 12 | 21 | 2:40 | 25,468 | Chase Field | Elmer Dessens | Justin Wayne (R) | Elmer Dessens | Justin Wayne | None |
| 2003-04-29 | Tue | FLO | NL | H | N | 27 | L | 5-7 | 9 | box - pbp | L1 | 11-16 | 4 | 13 | 23 | 2:53 | 29,380 | Chase Field | Byung-Hyun Kim | Mark Redman (L) | Mark Redman | Byung-Hyun Kim | None |
| 2003-04-30 | Wed | FLO | NL | H | N | 28 | W | 7-3 | 9 | box - pbp | W1 | 12-16 | 4 | 11 | 21 | 2:38 | 24,306 | Chase Field | Miguel Batista | Carl Pavano (R) | Miguel Batista | Carl Pavano | Matt Mantei |
| Game Date | Day | Opp | Lg | H/A | D/N | G | W/L | Result | Inn | Boxscores | Strk | Record | Div-Rk | Lg-Rk | MLB-Rk | Time | Att | Ballpark | Starting Pitcher | Opponent Pitcher | Winning Pitcher | Losing Pitcher | Save Pitcher |
| 2003-05-01 | Thu | FLO | NL | H | N | 29 | L | 3-4 | 9 | box - pbp | L1 | 12-17 | 4 | 12 | 22 | 2:26 | 25,044 | Chase Field | Andrew Good | Josh Beckett (R) | Armando Almanza | Oscar Villarreal | Braden Looper |
| 2003-05-02 | Fri | ATL | NL | H | N | 30 | L | 2-4 | 11 | box - pbp | L2 | 12-18 | 4 | 14 | 25 | 3:26 | 38,287 | Chase Field | Brandon Webb | Horacio Ramirez (L) | Jung Bong | Matt Mantei | None |
| 2003-05-03 | Sat | ATL | NL | H | N | 31 | W | 7-6 | 9 | box - pbp | W1 | 13-18 | 4 | 13 | 24 | 3:40 | 44,398 | Chase Field | Curt Schilling | Russ Ortiz (R) | Oscar Villarreal | Kevin Gryboski | Matt Mantei |
| 2003-05-04 | Sun | ATL | NL | H | N | 32 | L | 4-7 | 11 | box - pbp | L1 | 13-19 | 4 | 14 | 25 | 3:49 | 38,851 | Chase Field | Elmer Dessens | Greg Maddux (R) | Trey Hodges | Chris Capuano | John Smoltz |
| 2003-05-05 | Mon | PHI | NL | H | N | 33 | W | 10-1 | 9 | box - pbp | W1 | 14-19 | 4 | 13 | 24 | 2:42 | 25,407 | Chase Field | Miguel Batista | Vicente Padilla (R) | Miguel Batista | Vicente Padilla | None |
| 2003-05-06 | Tue | PHI | NL | H | N | 34 | W | 6-5 | 9 | box - pbp | W2 | 15-19 | 4 | 11 | 22 | 3:06 | 32,151 | Chase Field | Andrew Good | Brandon Duckworth (R) | Oscar Villarreal | Terry Adams | None |
| 2003-05-07 | Wed | PHI | NL | H | N | 35 | L | 2-5 | 9 | box - pbp | L1 | 15-20 | 4 | 11 | 22 | 2:56 | 28,485 | Chase Field | Brandon Webb | Kevin Millwood (R) | Kevin Millwood | Brandon Webb | Jose Mesa |
| 2003-05-09 | Fri | PIT | NL | A | N | 36 | W | 5-0 | 9 | box - pbp | W1 | 16-20 | 4 | 11 | 21 | 2:26 | 18,080 | PNC Park | Curt Schilling | Jeff D'Amico (R) | Curt Schilling | Jeff D'Amico | None |
| 2003-05-10 | Sat | PIT | NL | A | N | 37 | L | 4-5 | 9 | box - pbp | L1 | 16-21 | 4 | 11 | 21 | 2:31 | 30,776 | PNC Park | Elmer Dessens | Kris Benson (R) | Kris Benson | Elmer Dessens | Mike Williams |
| 2003-05-11 | Sun | PIT | NL | A | D | 38 | W | 2-1 | 9 | box - pbp | W1 | 17-21 | 4 | 11 | 21 | 2:42 | 14,976 | PNC Park | Miguel Batista | Kip Wells (R) | Miguel Batista | Kip Wells | Matt Mantei |
| 2003-05-13 | Tue | PHI | NL | A | N | 39 | W | 6-1 | 9 | box - pbp | W2 | 18-21 | 3 | 10 | 21 | 3:13 | 19,016 | Veterans Stadium | Brandon Webb | Kevin Millwood (R) | Mike Koplove | Jose Mesa | None |
| 2003-05-14 | Wed | PHI | NL | A | N | 40 | W | 2-0 | 9 | box - pbp | W3 | 19-21 | 3 | 10 | 20 | 2:08 | 19,195 | Veterans Stadium | Curt Schilling | Brett Myers (R) | Curt Schilling | Brett Myers | None |
| 2003-05-15 | Thu | PHI | NL | A | D | 41 | L | 4-6 | 9 | box - pbp | L1 | 19-22 | 4 | 11 | 20 | 2:58 | 24,012 | Veterans Stadium | Elmer Dessens | Randy Wolf (L) | Rheal Cormier | Oscar Villarreal | Jose Mesa |
| 2003-05-16 | Fri | PIT | NL | H | N | 42 | L | 5-8 | 12 | box - pbp | L2 | 19-23 | 4 | 11 | 20 | 3:26 | 31,578 | Chase Field | Miguel Batista | Kip Wells (R) | Brian Boehringer | Matt Mantei | Mike Williams |
| 2003-05-17 | Sat | PIT | NL | H | N | 43 | L | 5-8 | 9 | box - pbp | L3 | 19-24 | 4 | 11 | 21 | 2:46 | 42,858 | Chase Field | Chris Capuano | Salomon Torres (R) | Salomon Torres | Chris Capuano | Mike Williams |
| 2003-05-18 | Sun | PIT | NL | H | D | 44 | W | 8-6 | 9 | box - pbp | W1 | 20-24 | 4 | 11 | 20 | 2:45 | 34,669 | Chase Field | Brandon Webb | Jeff Suppan (R) | Brandon Webb | Jeff Suppan | None |
| 2003-05-19 | Mon | SFN | NL | H | N | 45 | W | 4-3 | 9 | box - pbp | W2 | 21-24 | 4 | 11 | 19 | 3:13 | 32,037 | Chase Field | Curt Schilling | Jesse Foppert (R) | Matt Mantei | Tim Worrell | None |
| 2003-05-20 | Tue | SFN | NL | H | N | 46 | L | 5-6 | 9 | box - pbp | L1 | 21-25 | 4 | 11 | 20 | 2:46 | 37,575 | Chase Field | Elmer Dessens | Kirk Rueter (L) | Kirk Rueter | Elmer Dessens | Tim Worrell |
| 2003-05-21 | Wed | SFN | NL | H | N | 47 | L | 0-6 | 9 | box - pbp | L2 | 21-26 | 4 | 11 | 21 | 2:29 | 35,886 | Chase Field | Miguel Batista | Jason Schmidt (R) | Jason Schmidt | Miguel Batista | None |
| 2003-05-23 | Fri | SDN | NL | H | N | 48 | W | 5-3 | 9 | box - pbp | W1 | 22-26 | 3 | 11 | 21 | 2:32 | 30,128 | Chase Field | Brandon Webb | Carlton Loewer (R) | Mike Koplove | Mike Matthews | Matt Mantei |
| 2003-05-24 | Sat | SDN | NL | H | N | 49 | L | 1-5 | 9 | box - pbp | L1 | 22-27 | 3 | 11 | 23 | 2:40 | 38,173 | Chase Field | Curt Schilling | Brian Lawrence (R) | Brian Lawrence | Curt Schilling | None |
| 2003-05-25 | Sun | SDN | NL | H | D | 50 | W | 9-5 | 9 | box - pbp | W1 | 23-27 | 3 | 10 | 21 | 3:06 | 35,137 | Chase Field | Elmer Dessens | Randy Keisler (L) | Elmer Dessens | Charles Nagy | None |
| 2003-05-26 | Mon | SDN | NL | H | D | 51 | W | 8-4 | 9 | box - pbp | W2 | 24-27 | 3 | 10 | 18 | 3:03 | 32,099 | Chase Field | Andrew Good | Adam Eaton (R) | Andrew Good | Adam Eaton | None |
| 2003-05-27 | Tue | SFN | NL | A | N | 52 | L | 3-4 | 13 | box - pbp | L1 | 24-28 | 4 | 11 | 21 | 3:52 | 36,693 | AT&T Park | Byung-Hyun Kim | Jason Schmidt (R) | Felix Rodriguez | Matt Mantei | None |
| 2003-05-28 | Wed | SFN | NL | A | N | 53 | L | 2-10 | 9 | box - pbp | L2 | 24-29 | 4 | 12 | 23 | 2:34 | 37,447 | AT&T Park | John Patterson | Damian Moss (L) | Damian Moss | John Patterson | None |
| 2003-05-30 | Fri | SDN | NL | A | N | 54 | W | 8-3 | 9 | box - pbp | W1 | 25-29 | 4 | 11 | 21 | 2:42 | 19,685 | Qualcomm Stadium | Curt Schilling | Brian Tollberg (R) | Curt Schilling | Brian Tollberg | None |
| 2003-05-31 | Sat | SDN | NL | A | N | 55 | L | 7-8 | 9 | box - pbp | L1 | 25-30 | 4 | 13 | 23 | 3:15 | 31,735 | Qualcomm Stadium | Elmer Dessens | Adam Eaton (R) | Jesse Orosco | Scott Service | Matt Herges |
| Game Date | Day | Opp | Lg | H/A | D/N | G | W/L | Result | Inn | Boxscores | Strk | Record | Div-Rk | Lg-Rk | MLB-Rk | Time | Att | Ballpark | Starting Pitcher | Opponent Pitcher | Winning Pitcher | Losing Pitcher | Save Pitcher |
| 2003-06-01 | Sun | SDN | NL | A | D | 56 | W | 10-4 | 9 | box - pbp | W1 | 26-30 | 4 | 12 | 21 | 3:12 | 24,355 | Qualcomm Stadium | Edgar Gonzalez | Jake Peavy (R) | Edgar Gonzalez | Jake Peavy | None |
| 2003-06-02 | Mon | SDN | NL | A | N | 57 | L | 1-4 | 9 | box - pbp | L1 | 26-31 | 4 | 12 | 21 | 2:38 | 14,496 | Qualcomm Stadium | John Patterson | Carlton Loewer (R) | Carlton Loewer | John Patterson | Matt Herges |
| 2003-06-03 | Tue | CHA | AL | H | N | 58 | W | 2-1 | 9 | box - pbp | W1 | 27-31 | 4 | 11 | 20 | 2:33 | 33,544 | Chase Field | Miguel Batista | Esteban Loaiza (R) | Oscar Villarreal | Tom Gordon | None |
| 2003-06-04 | Wed | CHA | AL | H | N | 59 | W | 8-6 | 9 | box - pbp | W2 | 28-31 | 4 | 11 | 20 | 2:43 | 26,667 | Chase Field | Andrew Good | Jon Garland (R) | Andrew Good | Jon Garland | Jose Valverde |
| 2003-06-05 | Thu | CHA | AL | H | N | 60 | L | 2-3 | 10 | box - pbp | L1 | 28-32 | 4 | 11 | 20 | 2:50 | 27,747 | Chase Field | Elmer Dessens | Danny Wright (R) | Billy Koch | Scott Service | None |
| 2003-06-06 | Fri | CLE | AL | H | N | 61 | L | 3-6 | 9 | box - pbp | L2 | 28-33 | 4 | 12 | 21 | 2:36 | 32,430 | Chase Field | Edgar Gonzalez | Jason Davis (R) | Jason Davis | Edgar Gonzalez | Danys Baez |
| 2003-06-07 | Sat | CLE | AL | H | D | 62 | W | 5-3 | 9 | box - pbp | W1 | 29-33 | 4 | 11 | 20 | 2:42 | 36,619 | Chase Field | John Patterson | Brian Anderson (L) | Steve Randolph | Brian Anderson | Jose Valverde |
| 2003-06-08 | Sun | CLE | AL | H | D | 63 | W | 13-3 | 9 | box - pbp | W2 | 30-33 | 4 | 11 | 19 | 2:29 | 42,956 | Chase Field | Brandon Webb | Ricardo Rodriguez (R) | Brandon Webb | Ricardo Rodriguez | None |
| 2003-06-10 | Tue | KCA | AL | A | N | 64 | L | 3-7 | 9 | box - pbp | L1 | 30-34 | 4 | 11 | 19 | 2:37 | 16,772 | Kauffman Stadium | Elmer Dessens | Kyle Snyder (R) | Jason Grimsley | Eddie Oropesa | None |
| 2003-06-11 | Wed | KCA | AL | A | N | 65 | W | 4-3 | 9 | box - pbp | W1 | 31-34 | 4 | 11 | 19 | 3:06 | 15,165 | Kauffman Stadium | Andrew Good | Darrell May (L) | Andrew Good | Darrell May | Jose Valverde |
| 2003-06-13 | Fri | MIN | AL | A | N | 66 | L | 1-3 | 9 | box - pbp | L1 | 31-35 | 4 | 12 | 21 | 2:14 | 26,620 | Hubert H. Humphrey Met | Brandon Webb | Johan Santana (L) | Johan Santana | Brandon Webb | Eddie Guardado |
| 2003-06-14 | Sat | MIN | AL | A | N | 67 | W | 9-2 | 9 | box - pbp | W1 | 32-35 | 4 | 11 | 19 | 2:58 | 30,200 | Hubert H. Humphrey Met | Miguel Batista | Joe Mays (R) | Miguel Batista | Joe Mays | None |
| 2003-06-15 | Sun | MIN | AL | A | D | 68 | W | 12-8 | 9 | box - pbp | W2 | 33-35 | 4 | 11 | 19 | 3:22 | 30,076 | Hubert H. Humphrey Met | Elmer Dessens | Brad Radke (R) | Mike Koplove | LaTroy Hawkins | None |
| 2003-06-17 | Tue | HOU | NL | A | N | 69 | L | 3-4 | 9 | box - pbp | L1 | 33-36 | 4 | 11 | 19 | 2:29 | 30,530 | Minute Maid Park | Andrew Good | Jeriome Robertson (L) | Octavio Dotel | Oscar Villarreal | Billy Wagner |
| 2003-06-18 | Wed | HOU | NL | A | N | 70 | W | 2-1 | 9 | box - pbp | W1 | 34-36 | 4 | 11 | 19 | 2:36 | 30,031 | Minute Maid Park | Brandon Webb | Ron Villone (L) | Oscar Villarreal | Billy Wagner | Jose Valverde |
| 2003-06-19 | Thu | HOU | NL | A | N | 71 | W | 4-2 | 9 | box - pbp | W2 | 35-36 | 4 | 11 | 19 | 2:33 | 30,534 | Minute Maid Park | Miguel Batista | Tim Redding (R) | Miguel Batista | Tim Redding | Jose Valverde |
| 2003-06-20 | Fri | CIN | NL | H | N | 72 | W | 6-5 | 9 | box - pbp | W3 | 36-36 | 3 | 9 | 17 | 3:06 | 34,842 | Chase Field | Elmer Dessens | Danny Graves (R) | Jose Valverde | Scott Williamson | None |
| 2003-06-21 | Sat | CIN | NL | H | N | 73 | W | 5-3 | 9 | box - pbp | W4 | 37-36 | 3 | 9 | 16 | 2:16 | 40,041 | Chase Field | John Patterson | Jimmy Anderson (L) | John Patterson | Jimmy Anderson | Jose Valverde |
| 2003-06-22 | Sun | CIN | NL | H | D | 74 | W | 6-5 | 9 | box - pbp | W5 | 38-36 | 3 | 9 | 16 | 2:58 | 35,536 | Chase Field | Andrew Good | Ryan Dempster (R) | Eddie Oropesa | Kent Mercker | Jose Valverde |
| 2003-06-23 | Mon | HOU | NL | H | N | 75 | W | 7-6 | 9 | box - pbp | W6 | 39-36 | 3 | 9 | 16 | 3:03 | 29,623 | Chase Field | Brandon Webb | Ron Villone (L) | Ricky Bottalico | Brad Lidge | Brady Raggio |
| 2003-06-24 | Tue | HOU | NL | H | N | 76 | W | 12-5 | 9 | box - pbp | W7 | 40-36 | 3 | 8 | 15 | 3:28 | 38,134 | Chase Field | Miguel Batista | Tim Redding (R) | Miguel Batista | Tim Redding | None |
| 2003-06-25 | Wed | HOU | NL | H | D | 77 | W | 3-2 | 9 | box - pbp | W8 | 41-36 | 3 | 7 | 14 | 2:24 | 34,647 | Chase Field | Elmer Dessens | Wade Miller (R) | Elmer Dessens | Wade Miller | Jose Valverde |
| 2003-06-27 | Fri | DET | AL | A | N | 78 | W | 8-3 | 9 | box - pbp | W9 | 42-36 | 3 | 6 | 12 | 2:54 | 27,682 | Comerica Park | John Patterson | Adam Bernero (R) | Steve Randolph | Adam Bernero | None |
| 2003-06-28 | Sat | DET | AL | A | N | 79 | W | 7-0 | 9 | box - pbp | W10 | 43-36 | 3 | 6 | 12 | 2:22 | 20,804 | Comerica Park | Brandon Webb | Jeremy Bonderman (R) | Brandon Webb | Jeremy Bonderman | None |
| 2003-06-29 | Sun | DET | AL | A | D | 80 | W | 5-3 | 10 | box - pbp | W11 | 44-36 | 3 | 6 | 11 | 2:51 | 18,989 | Comerica Park | Miguel Batista | Nate Cornejo (R) | Eddie Oropesa | Chris Spurling | Jose Valverde |
| 2003-06-30 | Mon | COL | NL | A | N | 81 | W | 8-7 | 12 | box - pbp | W12 | 45-36 | 3 | 5 | 9 | 3:52 | 33,533 | Coors Field | Elmer Dessens | Darren Oliver (L) | Steve Randolph | Jose Jimenez | None |
| Game Date | Day | Opp | Lg | H/A | D/N | G | W/L | Result | Inn | Boxscores | Strk | Record | Div-Rk | Lg-Rk | MLB-Rk | Time | Att | Ballpark | Starting Pitcher | Opponent Pitcher | Winning Pitcher | Losing Pitcher | Save Pitcher |
| 2003-07-01 | Tue | COL | NL | A | N | 82 | L | 4-7 | 9 | box - pbp | L1 | 45-37 | 3 | 5 | 9 | 2:55 | 25,209 | Coors Field | Andrew Good | Denny Stark (R) | Javier Lopez | Andrew Good | Justin Speier |
| 2003-07-02 | Wed | COL | NL | A | N | 83 | L | 2-6 | 9 | box - pbp | L2 | 45-38 | 3 | 6 | 11 | 3:00 | 47,032 | Coors Field | John Patterson | Jason Jennings (R) | Jason Jennings | John Patterson | Brian Fuentes |
| 2003-07-03 | Thu | COL | NL | A | N | 84 | W | 8-4 | 9 | box - pbp | W1 | 46-38 | 2 | 5 | 9 | 2:48 | 48,560 | Coors Field | Brandon Webb | Denny Neagle (L) | Brandon Webb | Denny Neagle | None |
| 2003-07-04 | Fri | LAN | NL | A | N | 85 | W | 3-1 | 10 | box - pbp | W2 | 47-38 | 2 | 4 | 8 | 3:23 | 55,038 | Dodger Stadium | Miguel Batista | Kazuhisa Ishii (L) | Oscar Villarreal | Tom Martin | Matt Mantei |
| 2003-07-05 | Sat | LAN | NL | A | D | 86 | L | 0-2 | 9 | box - pbp | L1 | 47-39 | 2 | 4 | 8 | 2:21 | 38,956 | Dodger Stadium | Elmer Dessens | Odalis Perez (L) | Odalis Perez | Elmer Dessens | Eric Gagne |
| 2003-07-06 | Sun | LAN | NL | A | N | 87 | W | 2-1 | 9 | box - pbp | W1 | 48-39 | 2 | 4 | 8 | 2:48 | 41,769 | Dodger Stadium | Andrew Good | Hideo Nomo (R) | Andrew Good | Hideo Nomo | Matt Mantei |
| 2003-07-07 | Mon | COL | NL | H | N | 88 | W | 14-6 | 9 | box - pbp | W2 | 49-39 | 2 | 3 | 7 | 2:55 | 32,019 | Chase Field | John Patterson | Jason Jennings (R) | Steve Randolph | Nelson Cruz | None |
| 2003-07-08 | Tue | COL | NL | H | N | 89 | W | 9-3 | 9 | box - pbp | W3 | 50-39 | 2 | 3 | 6 | 2:36 | 36,436 | Chase Field | Brandon Webb | Denny Neagle (L) | Brandon Webb | Steve Reed | None |
| 2003-07-09 | Wed | SDN | NL | H | N | 90 | W | 8-3 | 9 | box - pbp | W4 | 51-39 | 2 | 3 | 6 | 2:31 | 30,458 | Chase Field | Chris Capuano | Jake Peavy (R) | Chris Capuano | Jake Peavy | None |
| 2003-07-10 | Thu | SDN | NL | H | D | 91 | L | 2-14 | 9 | box - pbp | L1 | 51-40 | 2 | 4 | 8 | 3:07 | 33,336 | Chase Field | Elmer Dessens | Kevin Jarvis (R) | Kevin Jarvis | Elmer Dessens | None |
| 2003-07-11 | Fri | SFN | NL | H | N | 92 | L | 7-10 | 9 | box - pbp | L2 | 51-41 | 2 | 4 | 8 | 3:05 | 44,105 | Chase Field | Miguel Batista | Jason Schmidt (R) | Jason Schmidt | Miguel Batista | Felix Rodriguez |
| 2003-07-12 | Sat | SFN | NL | H | D | 93 | L | 1-8 | 9 | box - pbp | L3 | 51-42 | 2 | 4 | 9 | 3:15 | 45,653 | Chase Field | Curt Schilling | Jerome Williams (R) | Jerome Williams | Curt Schilling | None |
| 2003-07-13 | Sun | SFN | NL | H | D | 94 | W | 7-4 | 9 | box - pbp | W1 | 52-42 | 2 | 4 | 9 | 2:49 | 44,719 | Chase Field | Brandon Webb | Jim Brower (R) | Brandon Webb | Jim Brower | Matt Mantei |
| 2003-07-17 | Thu | SDN | NL | A | D | 95 | W | 9-1 | 9 | box - pbp | W2 | 53-42 | 2 | 4 | 9 | 2:52 | 27,346 | Qualcomm Stadium | Curt Schilling | Oliver Perez (L) | Curt Schilling | Oliver Perez | None |
| 2003-07-18 | Fri | SDN | NL | A | N | 96 | W | 6-0 | 9 | box - pbp | W3 | 54-42 | 2 | 4 | 8 | 2:14 | 24,223 | Qualcomm Stadium | Miguel Batista | Brian Lawrence (R) | Miguel Batista | Brian Lawrence | None |
| 2003-07-19 | Sat | SDN | NL | A | N | 97 | L | 0-2 | 9 | box - pbp | L1 | 54-43 | 2 | 4 | 9 | 2:32 | 38,901 | Qualcomm Stadium | Brandon Webb | Adam Eaton (R) | Adam Eaton | Brandon Webb | Rod Beck |
| 2003-07-20 | Sun | SDN | NL | A | D | 98 | L | 2-3 | 9 | box - pbp | L2 | 54-44 | 2 | 4 | 9 | 2:51 | 28,569 | Qualcomm Stadium | Randy Johnson | Kevin Jarvis (R) | Kevin Jarvis | Randy Johnson | Rod Beck |
| 2003-07-21 | Mon | SFN | NL | A | N | 99 | L | 4-5 | 9 | box - pbp | L3 | 54-45 | 2 | 4 | 9 | 2:50 | 41,421 | AT&T Park | Elmer Dessens | Jerome Williams (R) | Chad Zerbe | Elmer Dessens | Tim Worrell |
| 2003-07-22 | Tue | SFN | NL | A | N | 100 | L | 1-3 | 9 | box - pbp | L4 | 54-46 | 2 | 5 | 10 | 2:29 | 41,340 | AT&T Park | Curt Schilling | Damian Moss (L) | Damian Moss | Curt Schilling | Tim Worrell |
| 2003-07-23 | Wed | SFN | NL | A | N | 101 | L | 1-7 | 9 | box - pbp | L5 | 54-47 | 2 | 5 | 10 | 2:53 | 41,512 | AT&T Park | Miguel Batista | Jim Brower (R) | Jim Brower | Miguel Batista | None |
| 2003-07-24 | Thu | SFN | NL | A | D | 102 | L | 2-3 | 9 | box - pbp | L6 | 54-48 | 2 | 5 | 10 | 2:35 | 42,666 | AT&T Park | Brandon Webb | Chad Zerbe (L) | Tim Worrell | Mike Myers | None |
| 2003-07-25 | Fri | LAN | NL | H | N | 103 | W | 2-1 | 15 | box - pbp | W1 | 55-48 | 2 | 5 | 10 | 4:10 | 41,382 | Chase Field | Randy Johnson | Odalis Perez (L) | Steve Randolph | Paul Quantrill | None |
| 2003-07-26 | Sat | LAN | NL | H | D | 104 | W | 1-0 | 9 | box - pbp | W2 | 56-48 | 2 | 5 | 10 | 2:28 | 45,421 | Chase Field | Elmer Dessens | Andy Ashby (R) | Elmer Dessens | Andy Ashby | Matt Mantei |
| 2003-07-27 | Sun | LAN | NL | H | D | 105 | L | 0-1 | 9 | box - pbp | L1 | 56-49 | 2 | 5 | 10 | 2:39 | 42,067 | Chase Field | Curt Schilling | Hideo Nomo (R) | Hideo Nomo | Curt Schilling | Eric Gagne |
| 2003-07-28 | Mon | FLO | NL | A | N | 106 | L | 2-3 | 9 | box - pbp | L2 | 56-50 | 2 | 6 | 11 | 2:31 | 10,472 | Sun Life Stadium | Miguel Batista | Mark Redman (L) | Mark Redman | Miguel Batista | Braden Looper |
| 2003-07-29 | Tue | FLO | NL | A | N | 107 | L | 1-2 | 9 | box - pbp | L3 | 56-51 | 2 | 6 | 11 | 2:29 | 11,469 | Sun Life Stadium | Brandon Webb | Brad Penny (R) | Brad Penny | Brandon Webb | Braden Looper |
| 2003-07-30 | Wed | FLO | NL | A | N | 108 | L | 1-3 | 9 | box - pbp | L4 | 56-52 | 2 | 7 | 13 | 2:39 | 37,735 | Sun Life Stadium | Randy Johnson | Dontrelle Willis (L) | Dontrelle Willis | Randy Johnson | Braden Looper |
| Game Date | Day | Opp | Lg | H/A | D/N | G | W/L | Result | Inn | Boxscores | Strk | Record | Div-Rk | Lg-Rk | MLB-Rk | Time | Att | Ballpark | Starting Pitcher | Opponent Pitcher | Winning Pitcher | Losing Pitcher | Save Pitcher |
| 2003-08-01 | Fri | CHN | NL | A | D | 109 | L | 3-4 | 14 | box - pbp | L5 | 56-53 | 2 | 7 | 13 | 4:36 | 38,738 | Wrigley Field | Curt Schilling | Juan Cruz (R) | Antonio Alfonseca | Eddie Oropesa | None |
| 2003-08-02 | Sat | CHN | NL | A | D | 110 | W | 4-3 | 9 | box - pbp | W1 | 57-53 | 2 | 7 | 13 | 2:46 | 40,304 | Wrigley Field | Miguel Batista | Shawn Estes (L) | Oscar Villarreal | Joe Borowski | Matt Mantei |
| 2003-08-03 | Sun | CHN | NL | A | D | 111 | L | 1-2 | 9 | box - pbp | L1 | 57-54 | 2 | 8 | 14 | 2:30 | 39,473 | Wrigley Field | Brandon Webb | Matt Clement (R) | Matt Clement | Oscar Villarreal | Dave Veres |
| 2003-08-05 | Tue | MON | NL | H | N | 112 | W | 8-5 | 9 | box - pbp | W1 | 58-54 | 2 | 6 | 12 | 3:27 | 37,959 | Chase Field | Randy Johnson | Claudio Vargas (L) | Randy Johnson | Claudio Vargas | Matt Mantei |
| 2003-08-06 | Wed | MON | NL | H | N | 113 | W | 3-2 | 9 | box - pbp | W2 | 59-54 | 2 | 6 | 12 | 2:24 | 28,328 | Chase Field | Curt Schilling | Zach Day (R) | Eddie Oropesa | Luis Ayala | Matt Mantei |
| 2003-08-07 | Thu | MON | NL | H | N | 114 | W | 5-4 | 10 | box - pbp | W3 | 60-54 | 2 | 6 | 11 | 3:14 | 28,852 | Chase Field | Miguel Batista | Tomo Ohka (R) | Jose Valverde | Eric Knott | None |
| 2003-08-08 | Fri | NYN | NL | H | N | 115 | L | 1-3 | 9 | box - pbp | L1 | 60-55 | 2 | 6 | 12 | 2:56 | 36,335 | Chase Field | Brandon Webb | Tom Glavine (L) | Tom Glavine | Brandon Webb | Mike Stanton |
| 2003-08-09 | Sat | NYN | NL | H | N | 116 | W | 2-1 | 9 | box - pbp | W1 | 61-55 | 2 | 6 | 11 | 2:31 | 41,934 | Chase Field | Elmer Dessens | Jae-weong Seo (R) | Steve Randolph | John Franco | None |
| 2003-08-10 | Sun | NYN | NL | H | D | 117 | W | 7-4 | 9 | box - pbp | W2 | 62-55 | 2 | 6 | 11 | 2:37 | 37,521 | Chase Field | Randy Johnson | Al Leiter (L) | Randy Johnson | Al Leiter | Matt Mantei |
| 2003-08-12 | Tue | CIN | NL | A | N | 118 | W | 2-0 | 9 | box - pbp | W3 | 63-55 | 2 | 6 | 10 | 2:34 | 31,485 | Great American Ballpar | Curt Schilling | Paul Wilson (R) | Curt Schilling | Paul Wilson | Matt Mantei |
| 2003-08-13 | Wed | CIN | NL | A | N | 119 | W | 3-1 | 9 | box - pbp | W4 | 64-55 | 2 | 5 | 10 | 2:44 | 23,309 | Great American Ballpar | Miguel Batista | John Bale (L) | Steve Randolph | Felix Heredia | Matt Mantei |
| 2003-08-14 | Thu | CIN | NL | A | N | 120 | L | 2-3 | 9 | box - pbp | L1 | 64-56 | 2 | 5 | 10 | 2:36 | 25,056 | Great American Ballpar | Brandon Webb | Aaron Harang (R) | Aaron Harang | Brandon Webb | Chris Reitsma |
| 2003-08-15 | Fri | ATL | NL | A | N | 121 | L | 4-10 | 9 | box - pbp | L2 | 64-57 | 2 | 5 | 10 | 2:47 | 34,544 | Turner Field | Randy Johnson | Shane Reynolds (R) | Shane Reynolds | Randy Johnson | None |
| 2003-08-16 | Sat | ATL | NL | A | N | 122 | L | 6-10 | 9 | box - pbp | L3 | 64-58 | 2 | 6 | 12 | 3:24 | 49,127 | Turner Field | Elmer Dessens | Horacio Ramirez (L) | Kevin Gryboski | Eddie Oropesa | None |
| 2003-08-17 | Sun | ATL | NL | A | D | 123 | W | 2-0 | 9 | box - pbp | W1 | 65-58 | 2 | 5 | 10 | 2:24 | 37,606 | Turner Field | Curt Schilling | Greg Maddux (R) | Curt Schilling | Greg Maddux | Matt Mantei |
| 2003-08-18 | Mon | ATL | NL | A | D | 124 | L | 1-6 | 9 | box - pbp | L1 | 65-59 | 2 | 5 | 11 | 2:35 | 23,986 | Turner Field | Miguel Batista | Mike Hampton (L) | Mike Hampton | Miguel Batista | None |
| 2003-08-19 | Tue | CIN | NL | H | N | 125 | W | 6-1 | 9 | box - pbp | W1 | 66-59 | 2 | 5 | 10 | 2:35 | 34,869 | Chase Field | Brandon Webb | John Bale (L) | Brandon Webb | John Bale | Matt Mantei |
| 2003-08-20 | Wed | CIN | NL | H | N | 126 | L | 0-2 | 9 | box - pbp | L1 | 66-60 | 2 | 5 | 10 | 2:31 | 28,377 | Chase Field | Randy Johnson | Aaron Harang (R) | Aaron Harang | Randy Johnson | Chris Reitsma |
| 2003-08-21 | Thu | CIN | NL | H | N | 127 | W | 9-3 | 9 | box - pbp | W1 | 67-60 | 2 | 5 | 9 | 2:44 | 27,796 | Chase Field | Elmer Dessens | Danny Graves (R) | Elmer Dessens | Danny Graves | None |
| 2003-08-22 | Fri | CHN | NL | H | N | 128 | L | 1-4 | 9 | box - pbp | L1 | 67-61 | 3 | 6 | 12 | 2:01 | 39,612 | Chase Field | Curt Schilling | Carlos Zambrano (R) | Carlos Zambrano | Curt Schilling | None |
| 2003-08-23 | Sat | CHN | NL | H | D | 129 | W | 13-2 | 9 | box - pbp | W1 | 68-61 | 2 | 5 | 10 | 2:58 | 40,820 | Chase Field | Miguel Batista | Shawn Estes (L) | Miguel Batista | Shawn Estes | None |
| 2003-08-24 | Sun | CHN | NL | H | D | 130 | L | 3-5 | 9 | box - pbp | L1 | 68-62 | 2 | 5 | 12 | 3:43 | 40,129 | Chase Field | Brandon Webb | Matt Clement (R) | Matt Clement | Steve Randolph | Joe Borowski |
| 2003-08-25 | Mon | SDN | NL | H | N | 131 | W | 11-8 | 9 | box - pbp | W1 | 69-62 | 2 | 5 | 10 | 3:30 | 25,550 | Chase Field | Randy Johnson | Jake Peavy (R) | Randy Johnson | Jake Peavy | Matt Mantei |
| 2003-08-26 | Tue | SDN | NL | H | N | 132 | L | 4-5 | 9 | box - pbp | L1 | 69-63 | 2 | 7 | 13 | 2:57 | 31,196 | Chase Field | Elmer Dessens | Ben Howard (R) | Mike Matthews | Jose Valverde | Rod Beck |
| 2003-08-27 | Wed | SDN | NL | H | N | 133 | L | 2-10 | 9 | box - pbp | L2 | 69-64 | 2 | 9 | 15 | 2:50 | 26,565 | Chase Field | Curt Schilling | Brian Lawrence (R) | Brian Lawrence | Curt Schilling | None |
| 2003-08-29 | Fri | SFN | NL | H | N | 134 | W | 5-4 | 9 | box - pbp | W1 | 70-64 | 2 | 5 | 13 | 2:58 | 39,087 | Chase Field | Miguel Batista | Kirk Rueter (L) | Miguel Batista | Kirk Rueter | Matt Mantei |
| 2003-08-30 | Sat | SFN | NL | H | D | 135 | L | 1-2 | 9 | box - pbp | L1 | 70-65 | 3 | 8 | 15 | 2:41 | 39,383 | Chase Field | Randy Johnson | Jerome Williams (R) | Jerome Williams | Randy Johnson | Tim Worrell |
| 2003-08-31 | Sun | SFN | NL | H | N | 136 | L | 1-3 | 9 | box - pbp | L2 | 70-66 | 3 | 8 | 15 | 3:02 | 37,836 | Chase Field | Brandon Webb | Jason Schmidt (R) | Jason Schmidt | Brandon Webb | Tim Worrell |
| Game Date | Day | Opp | Lg | H/A | D/N | G | W/L | Result | Inn | Boxscores | Strk | Record | Div-Rk | Lg-Rk | MLB-Rk | Time | Att | Ballpark | Starting Pitcher | Opponent Pitcher | Winning Pitcher | Losing Pitcher | Save Pitcher |
| 2003-09-01 | Mon | SFN | NL | H | D | 137 | L | 0-2 | 9 | box - pbp | L3 | 70-67 | 3 | 9 | 16 | 2:45 | 33,416 | Chase Field | Curt Schilling | Sidney Ponson (R) | Sidney Ponson | Oscar Villarreal | Tim Worrell |
| 2003-09-02 | Tue | SDN | NL | A | N | 138 | L | 3-6 | 9 | box - pbp | L4 | 70-68 | 3 | 9 | 16 | 2:41 | 15,808 | Qualcomm Stadium | Chris Capuano | Ben Howard (R) | Ben Howard | Chris Capuano | None |
| 2003-09-03 | Wed | SDN | NL | A | N | 139 | L | 0-12 | 9 | box - pbp | L5 | 70-69 | 3 | 9 | 16 | 2:28 | 10,810 | Qualcomm Stadium | Miguel Batista | Brian Lawrence (R) | Brian Lawrence | Miguel Batista | None |
| 2003-09-04 | Thu | KCA | AL | A | D | 140 | W | 6-5 | 10 | box - pbp | W1 | 71-69 | 3 | 9 | 16 | 3:40 | 20,385 | Kauffman Stadium | Randy Johnson | Brad Voyles (R) | Matt Mantei | Kris Wilson | None |
| 2003-09-05 | Fri | SFN | NL | A | N | 141 | W | 8-1 | 9 | box - pbp | W2 | 72-69 | 3 | 9 | 16 | 2:53 | 41,727 | AT&T Park | Brandon Webb | Jerome Williams (R) | Brandon Webb | Jerome Williams | None |
| 2003-09-06 | Sat | SFN | NL | A | D | 142 | L | 4-5 | 11 | box - pbp | L1 | 72-70 | 3 | 9 | 16 | 3:56 | 42,312 | AT&T Park | Curt Schilling | Jason Schmidt (R) | Scott Eyre | Matt Mantei | None |
| 2003-09-07 | Sun | SFN | NL | A | D | 143 | W | 9-6 | 9 | box - pbp | W1 | 73-70 | 3 | 9 | 16 | 3:24 | 41,522 | AT&T Park | Elmer Dessens | Sidney Ponson (R) | Edgar Gonzalez | Joe Nathan | John Patterson |
| 2003-09-08 | Mon | LAN | NL | H | N | 144 | L | 3-10 | 9 | box - pbp | L1 | 73-71 | 3 | 9 | 16 | 2:57 | 25,937 | Chase Field | Miguel Batista | Kevin Brown (R) | Guillermo Mota | Oscar Villarreal | None |
| 2003-09-09 | Tue | LAN | NL | H | N | 145 | L | 1-4 | 9 | box - pbp | L2 | 73-72 | 3 | 9 | 16 | 2:22 | 36,488 | Chase Field | Randy Johnson | Edwin Jackson (R) | Edwin Jackson | Randy Johnson | Eric Gagne |
| 2003-09-10 | Wed | LAN | NL | H | N | 146 | W | 5-4 | 9 | box - pbp | W1 | 74-72 | 3 | 9 | 16 | 2:43 | 28,985 | Chase Field | Brandon Webb | Kazuhisa Ishii (L) | Oscar Villarreal | Paul Quantrill | Matt Mantei |
| 2003-09-11 | Thu | LAN | NL | H | N | 147 | W | 2-0 | 9 | box - pbp | W2 | 75-72 | 3 | 9 | 16 | 2:22 | 28,459 | Chase Field | Chris Capuano | Odalis Perez (L) | Chris Capuano | Odalis Perez | Matt Mantei |
| 2003-09-12 | Fri | COL | NL | H | N | 148 | L | 2-8 | 9 | box - pbp | L1 | 75-73 | 3 | 10 | 17 | 3:19 | 32,922 | Chase Field | Elmer Dessens | Jose Jimenez (R) | Jose Jimenez | Elmer Dessens | None |
| 2003-09-13 | Sat | COL | NL | H | N | 149 | W | 16-6 | 9 | box - pbp | W1 | 76-73 | 3 | 8 | 17 | 3:24 | 37,139 | Chase Field | Miguel Batista | Jason Young (R) | Miguel Batista | Jason Young | None |
| 2003-09-14 | Sun | COL | NL | H | D | 150 | W | 5-0 | 9 | box - pbp | W2 | 77-73 | 3 | 8 | 15 | 2:23 | 35,153 | Chase Field | Randy Johnson | Jason Jennings (R) | Randy Johnson | Jason Jennings | None |
| 2003-09-16 | Tue | LAN | NL | A | N | 151 | W | 3-2 | 9 | box - pbp | W3 | 78-73 | 3 | 8 | 15 | 2:44 | 31,689 | Dodger Stadium | Curt Schilling | Kazuhisa Ishii (L) | Curt Schilling | Kazuhisa Ishii | Matt Mantei |
| 2003-09-17 | Wed | LAN | NL | A | N | 152 | W | 2-0 | 9 | box - pbp | W4 | 79-73 | 3 | 8 | 14 | 2:33 | 35,162 | Dodger Stadium | Brandon Webb | Edwin Jackson (R) | Brandon Webb | Edwin Jackson | Matt Mantei |
| 2003-09-18 | Thu | LAN | NL | A | D | 153 | L | 0-2 | 9 | box - pbp | L1 | 79-74 | 3 | 8 | 16 | 2:24 | 36,523 | Dodger Stadium | Miguel Batista | Wilson Alvarez (L) | Wilson Alvarez | Miguel Batista | Eric Gagne |
| 2003-09-19 | Fri | MIL | NL | A | N | 154 | W | 3-2 | 9 | box - pbp | W1 | 80-74 | 3 | 8 | 15 | 2:55 | 27,154 | Miller Park | Randy Johnson | Doug Davis (L) | Oscar Villarreal | Shane Nance | Matt Mantei |
| 2003-09-20 | Sat | MIL | NL | A | N | 155 | W | 10-4 | 9 | box - pbp | W2 | 81-74 | 3 | 8 | 14 | 3:22 | 27,823 | Miller Park | Elmer Dessens | Wayne Franklin (L) | Elmer Dessens | Wayne Franklin | Jose Valverde |
| 2003-09-21 | Sun | MIL | NL | A | D | 156 | L | 4-6 | 9 | box - pbp | L1 | 81-75 | 3 | 8 | 16 | 2:29 | 30,547 | Miller Park | Curt Schilling | Wes Obermueller (R) | Wes Obermueller | Curt Schilling | Danny Kolb |
| 2003-09-23 | Tue | COL | NL | A | N | 157 | L | 9-20 | 9 | box - pbp | L2 | 81-76 | 3 | 9 | 17 | 3:06 | 22,686 | Coors Field | Brandon Webb | Darren Oliver (L) | Darren Oliver | Brandon Webb | None |
| 2003-09-24 | Wed | COL | NL | A | N | 158 | W | 6-3 | 9 | box - pbp | W1 | 82-76 | 3 | 9 | 17 | 2:57 | 24,465 | Coors Field | Randy Johnson | Jose Jimenez (R) | Randy Johnson | Jose Jimenez | Matt Mantei |
| 2003-09-25 | Thu | COL | NL | A | D | 159 | W | 8-7 | 9 | box - pbp | W2 | 83-76 | 3 | 8 | 17 | 3:48 | 23,056 | Coors Field | Miguel Batista | Scott Elarton (R) | Oscar Villarreal | Brian Fuentes | Matt Mantei |
| 2003-09-26 | Fri | SLN | NL | H | N | 160 | W | 7-6 | 9 | box - pbp | W3 | 84-76 | 3 | 8 | 15 | 3:09 | 37,180 | Chase Field | Elmer Dessens | Brett Tomko (R) | Steve Randolph | Brett Tomko | Matt Mantei |
| 2003-09-27 | Sat | SLN | NL | H | D | 161 | L | 2-3 | 9 | box - pbp | L1 | 84-77 | 3 | 8 | 16 | 3:09 | 39,650 | Chase Field | Chris Capuano | Sterling Hitchcock (L) | Sterling Hitchcock | Chris Capuano | Jason Isringhausen |
| 2003-09-28 | Sun | SLN | NL | H | D | 162 | L | 5-9 | 9 | box - pbp | L2 | 84-78 | 3 | 9 | 16 | 3:13 | 42,882 | Chase Field | Brandon Webb | Woody Williams (R) | Woody Williams | Brandon Webb | Jason Isringhausen |
Team Splits | Top |
| Category | GP | W | L | Wpct | RF | RA | Diff |
| Season Total | 162 | 84 | 78 | .519 | 717 | 685 | +32 |
| Home Games | 81 | 45 | 36 | .556 | 398 | 371 | +27 |
| Away Games | 81 | 39 | 42 | .481 | 319 | 314 | +5 |
| Night Games | 111 | 56 | 55 | .505 | 484 | 486 | -2 |
| Day Games | 51 | 28 | 23 | .549 | 233 | 199 | +34 |
| March/April | 28 | 12 | 16 | .429 | 109 | 119 | -10 |
| May | 27 | 13 | 14 | .481 | 127 | 124 | +3 |
| June | 26 | 20 | 6 | .769 | 149 | 99 | +50 |
| July | 27 | 11 | 16 | .407 | 99 | 103 | -4 |
| August | 28 | 14 | 14 | .500 | 110 | 107 | +3 |
| Sept/Oct | 26 | 14 | 12 | .538 | 123 | 133 | -10 |
| 1-Run Games | 55 | 30 | 25 | .545 | 191 | 186 | +5 |
| Close Games (1-2-3 Runs) | 106 | 51 | 55 | .481 | 371 | 391 | -20 |
| Blowouts (7+ runs) | 20 | 11 | 9 | .550 | 142 | 133 | +9 |
| Extra Innings | 16 | 8 | 8 | .500 | 66 | 68 | -2 |
| Shutouts | 23 | 11 | 12 | .478 | 35 | 47 | -12 |
| vs LHSP | 49 | 28 | 21 | .571 | 224 | 199 | +25 |
| vs RHSP | 113 | 56 | 57 | .496 | 493 | 486 | +7 |
| vs Division | 76 | 34 | 42 | .447 | 318 | 364 | -46 |
| vs League | 147 | 73 | 74 | .497 | 629 | 629 | 0 |
| InterLeague | 15 | 11 | 4 | .733 | 88 | 56 | +32 |
