| 1998-03-31 | @ CIN | 1 | W 10-2 | 1-0 | 2 | 54,578 | Kevin Brown | Mike Remlinger | Kevin Brown | Mike Remlinger | | 10 | 2 | 8 |
| 1998-04-01 | @ CIN | 2 | W 10-9 | 2-0 | 2 | 13,706 | Joey Hamilton | Pete Harnisch | Joey Hamilton | Scott Sullivan | Trevor Hoffman | 20 | 11 | 9 |
| 1998-04-02 | @ CIN | 3 | L 1-5 | 2-1 | 2 | 13,630 | Andy Ashby | Steve Cooke | Steve Cooke | Andy Ashby | Jeff Shaw | 21 | 16 | 5 |
| 1998-04-03 | @ SLN | 4 | W 13-5 | 3-1 | 2 | 26,760 | Mark Langston | Manny Aybar | Mark Langston | Manny Aybar | | 34 | 21 | 13 |
| 1998-04-04 | @ SLN | 5 | L 6-8 | 3-2 | 3 | 34,292 | Pete Smith | Kent Mercker | Kent Mercker | Pete Smith | Kent Bottenfield | 40 | 29 | 11 |
| 1998-04-05 | @ SLN | 6 | W 8-7 | 4-2 | 2 | 35,499 | Kevin Brown | Todd Stottlemyre | Trevor Hoffman | Braden Looper | Dan Miceli | 48 | 36 | 12 |
| 1998-04-07 | vs CIN | 7 | W 3-2 | 5-2 | 1 | 55,454 | Joey Hamilton | Pete Harnisch | Trevor Hoffman | Jeff Shaw | | 51 | 38 | 13 |
| 1998-04-08 | vs CIN | 8 | W 6-3 | 6-2 | 1 | 19,626 | Andy Ashby | Gabe White | Andy Ashby | Gabe White | Trevor Hoffman | 57 | 41 | 16 |
| 1998-04-09 | vs CIN | 9 | W 6-2 | 7-2 | 1 | 24,482 | Mark Langston | Brett Tomko | Brian Boehringer | Brett Tomko | | 63 | 43 | 20 |
| 1998-04-10 | vs ARI | 10 | W 6-4 | 8-2 | 1 | 27,243 | Kevin Brown | Andy Benes | Dan Miceli | Felix Rodriguez | | 69 | 47 | 22 |
| 1998-04-11 | vs ARI | 11 | W 7-0 | 9-2 | 1 | 37,753 | Pete Smith | Joel Adamson | Pete Smith | Joel Adamson | | 76 | 47 | 29 |
| 1998-04-12 | vs ARI | 12 | W 4-2 | 10-2 | 1 | 26,217 | Joey Hamilton | Willie Blair | Joey Hamilton | Willie Blair | Trevor Hoffman | 80 | 49 | 31 |
| 1998-04-13 | vs ARI | 13 | W 1-0 | 11-2 | 1 | 36,278 | Andy Ashby | Brian Anderson | Andy Ashby | Brian Anderson | | 81 | 49 | 32 |
| 1998-04-14 | @ SFN | 14 | L 7-13 | 11-3 | 1 | 11,669 | Mark Langston | Mark Gardner | Julian Tavarez | Brian Boehringer | | 88 | 62 | 26 |
| 1998-04-15 | @ SFN | 15 | W 1-0 | 12-3 | 1 | 16,255 | Kevin Brown | Danny Darwin | Kevin Brown | Danny Darwin | | 89 | 62 | 27 |
| 1998-04-17 | @ PIT | 16 | W 7-5 | 13-3 | 1 | 12,555 | Joey Hamilton | Jason Schmidt | Brian Boehringer | Jeff Tabaka | Trevor Hoffman | 96 | 67 | 29 |
| 1998-04-18 | @ PIT | 17 | W 7-5 | 14-3 | 1 | 14,728 | Andy Ashby | Esteban Loaiza | Dan Miceli | Rich Loiselle | Trevor Hoffman | 103 | 72 | 31 |
| 1998-04-21 | @ CHN | 18 | L 3-5 | 14-4 | 1 | 20,363 | Kevin Brown | Steve Trachsel | Steve Trachsel | Kevin Brown | Rod Beck | 106 | 77 | 29 |
| 1998-04-22 | @ CHN | 19 | W 3-2 | 15-4 | 1 | 15,852 | Joey Hamilton | Kevin Tapani | Brian Boehringer | Amaury Telemaco | Carlos Reyes | 109 | 79 | 30 |
| 1998-04-23 | @ CHN | 20 | W 4-1 | 16-4 | 1 | 20,276 | Andy Ashby | Mark Clark | Andy Ashby | Mark Clark | Trevor Hoffman | 113 | 80 | 33 |
| 1998-04-24 | vs PIT | 21 | L 2-4 | 16-5 | 1 | 26,413 | Pete Smith | Jason Schmidt | Jason Schmidt | Pete Smith | Ricardo Rincon | 115 | 84 | 31 |
| 1998-04-25 | vs PIT | 22 | W 4-3 | 17-5 | 1 | 53,710 | Sterling Hitchcock | Esteban Loaiza | Carlos Reyes | Javier Martinez | | 119 | 87 | 32 |
| 1998-04-26 | vs PIT | 23 | L 0-6 | 17-6 | 1 | 42,281 | Kevin Brown | Jon Lieber | Jon Lieber | Kevin Brown | | 119 | 93 | 26 |
| 1998-04-27 | vs CHN | 24 | L 1-3 | 17-7 | 1 | 20,106 | Joey Hamilton | Kevin Tapani | Kevin Tapani | Joey Hamilton | Rod Beck | 120 | 96 | 24 |
| 1998-04-28 | vs CHN | 25 | W 7-3 | 18-7 | 1 | 21,024 | Andy Ashby | Mark Clark | Andy Ashby | Mark Clark | Sterling Hitchcock | 127 | 99 | 28 |
| 1998-04-30 | @ FLO | 26 | W 4-1 | 19-7 | 1 | 14,562 | Pete Smith | Brian Meadows | Pete Smith | Brian Meadows | Trevor Hoffman | 131 | 100 | 31 |
| 1998-05-01 | @ FLO | 27 | L 5-6 | 19-8 | 1 | 19,465 | Kevin Brown | Livan Hernandez | Jay Powell | Dan Miceli | | 136 | 106 | 30 |
| 1998-05-02 | @ FLO | 28 | W 8-7 | 20-8 | 1 | 22,383 | Joey Hamilton | Eric Ludwick | Joey Hamilton | Eric Ludwick | Trevor Hoffman | 144 | 113 | 31 |
| 1998-05-03 | @ FLO | 29 | L 0-1 | 20-9 | 1 | 18,644 | Andy Ashby | Jesus Sanchez | Jesus Sanchez | Andy Ashby | Jay Powell | 144 | 114 | 30 |
| 1998-05-04 | @ MIL | 30 | W 13-5 | 21-9 | 1 | 9,357 | Sterling Hitchcock | Jose Mercedes | Sterling Hitchcock | Jose Mercedes | Don Wengert | 157 | 119 | 38 |
| 1998-05-05 | @ MIL | 31 | W 13-4 | 22-9 | 1 | 9,162 | Pete Smith | Paul Wagner | Pete Smith | Paul Wagner | | 170 | 123 | 47 |
| 1998-05-06 | @ MIL | 32 | L 2-3 | 22-10 | 1 | 13,381 | Kevin Brown | Scott Karl | Doug Jones | Carlos Reyes | | 172 | 126 | 46 |
| 1998-05-07 | @ ATL | 33 | L 3-6 | 22-11 | 1 | 31,811 | Joey Hamilton | John Smoltz | John Smoltz | Joey Hamilton | Kerry Ligtenberg | 175 | 132 | 43 |
| 1998-05-08 | @ ATL | 34 | W 3-2 | 23-11 | 1 | 37,490 | Andy Ashby | Tom Glavine | Andy Ashby | Tom Glavine | Trevor Hoffman | 178 | 134 | 44 |
| 1998-05-09 | @ ATL | 35 | L 4-6 | 23-12 | 1 | 46,160 | Sterling Hitchcock | Kevin Millwood | Kevin Millwood | Ben VanRyn | Kerry Ligtenberg | 182 | 140 | 42 |
| 1998-05-10 | @ ATL | 36 | L 5-8 | 23-13 | 1 | 33,376 | Pete Smith | Denny Neagle | Mike Cather | Donne Wall | Kerry Ligtenberg | 187 | 148 | 39 |
| 1998-05-11 | vs NYN | 37 | W 2-1 | 24-13 | 1 | 15,291 | Kevin Brown | Al Leiter | Kevin Brown | Al Leiter | Trevor Hoffman | 189 | 149 | 40 |
| 1998-05-13 | vs NYN | 38 | L 3-4 | 24-14 | 1 | 14,929 | Joey Hamilton | Bobby Jones | Bobby Jones | Joey Hamilton | John Franco | 192 | 153 | 39 |
| 1998-05-14 | vs NYN | 39 | W 3-1 | 26-14 | 1 | 0 | Andy Ashby | Dave Mlicki | Brian Boehringer | Dennis Cook | Trevor Hoffman | 195 | 154 | 41 |
| 1998-05-14 | vs NYN | 40 | W 6-2 | 26-14 | 1 | 26,488 | Sterling Hitchcock | Brian Bohanon | Dan Miceli | Greg McMichael | | 201 | 156 | 45 |
| 1998-05-15 | vs PHI | 41 | W 7-6 | 27-14 | 1 | 25,157 | Pete Smith | Mike Grace | Brian Boehringer | Mike Grace | Trevor Hoffman | 208 | 162 | 46 |
| 1998-05-16 | vs PHI | 42 | W 3-2 | 28-14 | 1 | 53,117 | Kevin Brown | Matt Beech | Carlos Reyes | Mark Leiter | | 211 | 164 | 47 |
| 1998-05-17 | vs PHI | 43 | W 3-1 | 29-14 | 1 | 27,913 | Donne Wall | Curt Schilling | Donne Wall | Curt Schilling | Trevor Hoffman | 214 | 165 | 49 |
| 1998-05-19 | @ PIT | 44 | L 0-3 | 29-15 | 1 | 10,493 | Joey Hamilton | Jose Silva | Jose Silva | Joey Hamilton | Rich Loiselle | 214 | 168 | 46 |
| 1998-05-20 | @ PIT | 45 | L 2-5 | 30-16 | 1 | 0 | Andy Ashby | Francisco Cordova | Francisco Cordova | Andy Ashby | Rich Loiselle | 216 | 173 | 43 |
| 1998-05-20 | @ PIT | 46 | W 8-3 | 30-16 | 1 | 17,248 | Sterling Hitchcock | Chris Peters | Sterling Hitchcock | Chris Peters | | 224 | 176 | 48 |
| 1998-05-21 | @ PIT | 47 | L 2-3 | 30-17 | 1 | 10,222 | Kevin Brown | Jason Schmidt | Jason Schmidt | Kevin Brown | Ricardo Rincon | 226 | 179 | 47 |
| 1998-05-22 | @ HOU | 48 | W 9-6 | 31-17 | 1 | 28,550 | Pete Smith | Sean Bergman | Dan Miceli | C.J. Nitkowski | Trevor Hoffman | 235 | 185 | 50 |
| 1998-05-23 | @ HOU | 49 | L 3-4 | 31-18 | 1 | 36,281 | Mark Langston | Mike Hampton | Trever Miller | Dan Miceli | Billy Wagner | 238 | 189 | 49 |
| 1998-05-24 | @ HOU | 50 | L 2-5 | 31-19 | 1 | 25,701 | Joey Hamilton | Pete Schourek | Pete Schourek | Joey Hamilton | Billy Wagner | 240 | 194 | 46 |
| 1998-05-25 | @ ARI | 51 | L 2-3 | 31-20 | 1 | 45,367 | Andy Ashby | Omar Daal | Russ Springer | Andy Ashby | Gregg Olson | 242 | 197 | 45 |
| 1998-05-26 | @ ARI | 52 | W 12-1 | 32-20 | 1 | 41,204 | Kevin Brown | Jeff Suppan | Kevin Brown | Jeff Suppan | | 254 | 198 | 56 |
| 1998-05-27 | @ ARI | 53 | W 6-4 | 33-20 | 1 | 42,844 | Sterling Hitchcock | Andy Benes | Donne Wall | Andy Benes | Trevor Hoffman | 260 | 202 | 58 |
| 1998-05-29 | vs SLN | 54 | L 3-8 | 33-21 | 1 | 36,648 | Joey Hamilton | Mark Petkovsek | Mark Petkovsek | Joey Hamilton | | 263 | 210 | 53 |
| 1998-05-30 | vs SLN | 55 | W 3-2 | 34-21 | 1 | 54,089 | Andy Ashby | Juan Acevedo | Andy Ashby | Jeff Brantley | | 266 | 212 | 54 |
| 1998-05-31 | vs SLN | 56 | W 7-3 | 35-21 | 1 | 42,618 | Kevin Brown | Sean Lowe | Kevin Brown | Sean Lowe | | 273 | 215 | 58 |
| 1998-06-01 | vs SLN | 57 | W 3-2 | 36-21 | 1 | 22,156 | Sterling Hitchcock | Todd Stottlemyre | Sterling Hitchcock | Todd Stottlemyre | Trevor Hoffman | 276 | 217 | 59 |
| 1998-06-02 | vs HOU | 58 | L 3-4 | 36-22 | 1 | 15,735 | Mark Langston | Shane Reynolds | Shane Reynolds | Carlos Reyes | Billy Wagner | 279 | 221 | 58 |
| 1998-06-03 | vs HOU | 59 | L 2-8 | 36-23 | 1 | 13,229 | Joey Hamilton | Sean Bergman | Sean Bergman | Joey Hamilton | | 281 | 229 | 52 |
| 1998-06-04 | vs HOU | 60 | W 5-1 | 37-23 | 1 | 21,027 | Andy Ashby | Mike Hampton | Andy Ashby | Mike Hampton | | 286 | 230 | 56 |
| 1998-06-05 | @ TEX | 61 | L 7-8 | 37-24 | 1 | 37,903 | Kevin Brown | Darren Oliver | Tim Crabtree | Donne Wall | John Wetteland | 293 | 238 | 55 |
| 1998-06-06 | @ TEX | 62 | L 0-3 | 37-25 | 2 | 46,022 | Sterling Hitchcock | John Burkett | John Burkett | Sterling Hitchcock | John Wetteland | 293 | 241 | 52 |
| 1998-06-07 | @ TEX | 63 | W 17-8 | 38-25 | 2 | 46,372 | Mark Langston | Bobby Witt | Dan Miceli | Danny Patterson | | 310 | 249 | 61 |
| 1998-06-08 | vs CIN | 64 | W 4-2 | 39-25 | 2 | 14,620 | Joey Hamilton | Scott Winchester | Joey Hamilton | Scott Sullivan | Trevor Hoffman | 314 | 251 | 63 |
| 1998-06-09 | vs CIN | 65 | W 5-1 | 40-25 | 2 | 14,857 | Andy Ashby | Brett Tomko | Andy Ashby | Brett Tomko | Trevor Hoffman | 319 | 252 | 67 |
| 1998-06-10 | vs CIN | 66 | W 2-1 | 41-25 | 1 | 12,957 | Kevin Brown | Pete Harnisch | Kevin Brown | Jeff Shaw | | 321 | 253 | 68 |
| 1998-06-12 | vs SFN | 67 | W 10-3 | 42-25 | 1 | 60,789 | Sterling Hitchcock | Kirk Rueter | Dan Miceli | Steve Reed | | 331 | 256 | 75 |
| 1998-06-13 | vs SFN | 68 | W 4-2 | 43-25 | 1 | 54,390 | Joey Hamilton | Mark Gardner | Joey Hamilton | Mark Gardner | Trevor Hoffman | 335 | 258 | 77 |
| 1998-06-14 | vs SFN | 69 | W 3-2 | 44-25 | 1 | 40,151 | Andy Ashby | Danny Darwin | Andy Ashby | Danny Darwin | Trevor Hoffman | 338 | 260 | 78 |
| 1998-06-16 | vs LAN | 70 | W 10-6 | 45-25 | 1 | 38,166 | Kevin Brown | Chan Ho Park | Kevin Brown | Chan Ho Park | Trevor Hoffman | 348 | 266 | 82 |
| 1998-06-17 | vs LAN | 71 | W 3-2 | 46-25 | 1 | 35,765 | Sterling Hitchcock | Ismael Valdez | Trevor Hoffman | Dennys Reyes | | 351 | 268 | 83 |
| 1998-06-18 | @ SFN | 72 | W 7-6 | 47-25 | 1 | 16,899 | Joey Hamilton | Mark Gardner | Roberto Ramirez | John Johnstone | Dan Miceli | 358 | 274 | 84 |
| 1998-06-19 | @ SFN | 73 | W 9-5 | 48-25 | 1 | 23,034 | Andy Ashby | Danny Darwin | Andy Ashby | Danny Darwin | | 367 | 279 | 88 |
| 1998-06-20 | @ SFN | 74 | L 2-5 | 48-26 | 1 | 35,782 | Mark Langston | Shawn Estes | Shawn Estes | Mark Langston | Robb Nen | 369 | 284 | 85 |
| 1998-06-21 | @ SFN | 75 | W 5-1 | 49-26 | 1 | 46,506 | Kevin Brown | Orel Hershiser | Kevin Brown | Orel Hershiser | Trevor Hoffman | 374 | 285 | 89 |
| 1998-06-22 | @ SEA | 76 | W 5-3 | 50-26 | 1 | 41,571 | Sterling Hitchcock | Jeff Fassero | Dan Miceli | Jeff Fassero | Trevor Hoffman | 379 | 288 | 91 |
| 1998-06-23 | @ SEA | 77 | L 3-5 | 50-27 | 1 | 30,961 | Joey Hamilton | Jamie Moyer | Jamie Moyer | Joey Hamilton | Heathcliff Slocumb | 382 | 293 | 89 |
| 1998-06-24 | vs SEA | 78 | L 1-2 | 50-28 | 1 | 36,900 | Andy Ashby | Randy Johnson | Randy Johnson | Andy Ashby | | 383 | 295 | 88 |
| 1998-06-25 | vs SEA | 79 | W 6-0 | 51-28 | 1 | 32,626 | Mark Langston | Ken Cloude | Mark Langston | Ken Cloude | Donne Wall | 389 | 295 | 94 |
| 1998-06-26 | vs ANA | 80 | W 6-3 | 52-28 | 1 | 40,621 | Kevin Brown | Jason Dickson | Kevin Brown | Jason Dickson | Trevor Hoffman | 395 | 298 | 97 |
| 1998-06-27 | vs ANA | 81 | W 5-1 | 53-28 | 1 | 31,948 | Sterling Hitchcock | Omar Olivares | Sterling Hitchcock | Omar Olivares | | 400 | 299 | 101 |
| 1998-06-28 | vs ANA | 82 | L 3-11 | 53-29 | 1 | 41,547 | Joey Hamilton | Jarrod Washburn | Jarrod Washburn | Joey Hamilton | | 403 | 310 | 93 |
| 1998-06-30 | @ OAK | 83 | L 10-12 | 53-30 | 1 | 10,263 | Andy Ashby | Jimmy Haynes | Billy Taylor | Dan Miceli | Mike Fetters | 413 | 322 | 91 |
| 1998-07-01 | @ OAK | 84 | W 8-4 | 54-30 | 1 | 10,154 | Kevin Brown | Blake Stein | Kevin Brown | Blake Stein | | 421 | 326 | 95 |
| 1998-07-02 | @ OAK | 85 | L 2-7 | 54-31 | 1 | 40,374 | Sterling Hitchcock | Kenny Rogers | Kenny Rogers | Sterling Hitchcock | | 423 | 333 | 90 |
| 1998-07-03 | vs COL | 86 | W 4-2 | 55-31 | 1 | 40,588 | Joey Hamilton | Jamey Wright | Joey Hamilton | Mike DeJean | Trevor Hoffman | 427 | 335 | 92 |
| 1998-07-04 | vs COL | 87 | W 9-1 | 56-31 | 1 | 61,148 | Mark Langston | Bobby Jones | Mark Langston | Bobby Jones | | 436 | 336 | 100 |
| 1998-07-05 | vs COL | 88 | W 7-2 | 57-31 | 1 | 32,649 | Andy Ashby | Pedro Astacio | Andy Ashby | Pedro Astacio | | 443 | 338 | 105 |
| 1998-07-09 | @ LAN | 89 | L 3-12 | 57-32 | 1 | 41,250 | Mark Langston | Chan Ho Park | Chan Ho Park | Mark Langston | | 446 | 350 | 96 |
| 1998-07-10 | @ LAN | 90 | L 2-6 | 57-33 | 1 | 53,245 | Kevin Brown | Darren Dreifort | Antonio Osuna | Dan Miceli | | 448 | 356 | 92 |
| 1998-07-11 | @ LAN | 91 | W 4-1 | 58-33 | 1 | 48,950 | Andy Ashby | Ismael Valdez | Andy Ashby | Ismael Valdez | Trevor Hoffman | 452 | 357 | 95 |
| 1998-07-12 | @ LAN | 92 | W 6-3 | 59-33 | 1 | 42,056 | Joey Hamilton | Brian Bohanon | Joey Hamilton | Brian Bohanon | Trevor Hoffman | 458 | 360 | 98 |
| 1998-07-13 | @ COL | 93 | L 5-9 | 59-34 | 1 | 48,098 | Sterling Hitchcock | Bobby Jones | Bobby Jones | Sterling Hitchcock | | 463 | 369 | 94 |
| 1998-07-14 | @ COL | 94 | W 8-7 | 60-34 | 1 | 48,114 | Mark Langston | Darryl Kile | Scott Sanders | Darryl Kile | Trevor Hoffman | 471 | 376 | 95 |
| 1998-07-15 | @ COL | 95 | W 6-2 | 61-34 | 1 | 48,369 | Kevin Brown | Jamey Wright | Kevin Brown | Jamey Wright | | 477 | 378 | 99 |
| 1998-07-17 | @ CIN | 96 | W 13-3 | 62-34 | 1 | 26,443 | Andy Ashby | Mike Remlinger | Andy Ashby | Mike Remlinger | | 490 | 381 | 109 |
| 1998-07-18 | @ CIN | 97 | W 2-1 | 63-34 | 1 | 30,289 | Joey Hamilton | Pete Harnisch | Joey Hamilton | Pete Harnisch | Trevor Hoffman | 492 | 382 | 110 |
| 1998-07-19 | @ CIN | 98 | W 7-6 | 64-34 | 1 | 23,439 | Sterling Hitchcock | Scott Winchester | Donne Wall | John Hudek | Trevor Hoffman | 499 | 388 | 111 |
| 1998-07-20 | vs SLN | 99 | L 1-13 | 64-35 | 1 | 32,339 | Mark Langston | Matt Morris | Matt Morris | Mark Langston | | 500 | 401 | 99 |
| 1998-07-21 | vs SLN | 100 | W 6-3 | 65-35 | 1 | 37,145 | Kevin Brown | Kent Mercker | Kevin Brown | Kent Mercker | Trevor Hoffman | 506 | 404 | 102 |
| 1998-07-22 | vs ARI | 101 | W 9-3 | 66-35 | 1 | 18,780 | Andy Ashby | Willie Blair | Andy Ashby | Willie Blair | | 515 | 407 | 108 |
| 1998-07-23 | vs ARI | 102 | W 3-0 | 67-35 | 1 | 24,278 | Joey Hamilton | Brian Anderson | Joey Hamilton | Brian Anderson | Trevor Hoffman | 518 | 407 | 111 |
| 1998-07-24 | vs HOU | 103 | L 1-2 | 67-36 | 1 | 31,047 | Sterling Hitchcock | Pete Schourek | Pete Schourek | Sterling Hitchcock | Mike Magnante | 519 | 409 | 110 |
| 1998-07-25 | vs HOU | 104 | W 6-5 | 68-36 | 1 | 54,176 | Mark Langston | Shane Reynolds | Mark Langston | Shane Reynolds | Trevor Hoffman | 525 | 414 | 111 |
| 1998-07-26 | vs HOU | 105 | W 5-4 | 69-36 | 1 | 41,034 | Kevin Brown | Mike Hampton | Donne Wall | Mike Magnante | | 530 | 418 | 112 |
| 1998-07-28 | @ NYN | 106 | L 3-7 | 69-37 | 1 | 21,005 | Andy Ashby | Hideo Nomo | Hideo Nomo | Andy Ashby | Greg McMichael | 533 | 425 | 108 |
| 1998-07-29 | @ NYN | 107 | L 6-7 | 69-38 | 1 | 23,694 | Joey Hamilton | Al Leiter | Mel Rojas | Donne Wall | John Franco | 539 | 432 | 107 |
| 1998-07-30 | @ NYN | 108 | W 3-1 | 70-38 | 1 | 22,882 | Sterling Hitchcock | Bobby Jones | Dan Miceli | Dennis Cook | Trevor Hoffman | 542 | 433 | 109 |
| 1998-07-31 | @ MON | 109 | W 5-4 | 71-38 | 1 | 10,340 | Kevin Brown | Carl Pavano | Kevin Brown | Carl Pavano | Trevor Hoffman | 547 | 437 | 110 |
| 1998-08-01 | @ MON | 110 | L 2-4 | 71-39 | 1 | 28,937 | Mark Langston | Miguel Batista | Shayne Bennett | Mark Langston | Ugueth Urbina | 549 | 441 | 108 |
| 1998-08-02 | @ MON | 111 | W 4-1 | 72-39 | 1 | 14,485 | Andy Ashby | Javier Vazquez | Andy Ashby | Javier Vazquez | Trevor Hoffman | 553 | 442 | 111 |
| 1998-08-03 | @ MON | 112 | L 1-6 | 72-40 | 1 | 10,129 | Brian Boehringer | Dustin Hermanson | Dustin Hermanson | Brian Boehringer | | 554 | 448 | 106 |
| 1998-08-04 | vs PHI | 113 | W 3-1 | 73-40 | 1 | 22,125 | Sterling Hitchcock | Matt Beech | Sterling Hitchcock | Matt Beech | Trevor Hoffman | 557 | 449 | 108 |
| 1998-08-05 | vs PHI | 114 | W 4-0 | 74-40 | 1 | 19,109 | Kevin Brown | Curt Schilling | Kevin Brown | Curt Schilling | | 561 | 449 | 112 |
| 1998-08-06 | vs PHI | 115 | L 2-3 | 74-41 | 1 | 19,007 | Joey Hamilton | Mark Portugal | Mark Leiter | Trevor Hoffman | | 563 | 452 | 111 |
| 1998-08-07 | vs FLO | 116 | W 6-3 | 75-41 | 1 | 39,145 | Andy Ashby | Kirt Ojala | Scott Sanders | Justin Speier | | 569 | 455 | 114 |
| 1998-08-09 | vs FLO | 117 | W 6-5 | 76-41 | 1 | 21,065 | Sterling Hitchcock | Andy Larkin | Sterling Hitchcock | Andy Larkin | Trevor Hoffman | 575 | 460 | 115 |
| 1998-08-10 | vs FLO | 118 | L 2-3 | 76-42 | 1 | 41,514 | Kevin Brown | Livan Hernandez | Livan Hernandez | Kevin Brown | | 577 | 463 | 114 |
| 1998-08-11 | vs ATL | 119 | W 3-1 | 77-42 | 1 | 31,430 | Joey Hamilton | Denny Neagle | Joey Hamilton | Denny Neagle | Trevor Hoffman | 580 | 464 | 116 |
| 1998-08-12 | vs ATL | 120 | W 5-1 | 78-42 | 1 | 40,597 | Andy Ashby | Greg Maddux | Andy Ashby | Greg Maddux | | 585 | 465 | 120 |
| 1998-08-13 | vs ATL | 121 | L 0-5 | 78-43 | 1 | 34,547 | Mark Langston | Tom Glavine | Tom Glavine | Mark Langston | | 585 | 470 | 115 |
| 1998-08-14 | vs MIL | 122 | W 7-0 | 79-43 | 1 | 38,639 | Sterling Hitchcock | Scott Karl | Sterling Hitchcock | Scott Karl | | 592 | 470 | 122 |
| 1998-08-16 | vs MIL | 123 | W 4-0 | 80-44 | 1 | 0 | Kevin Brown | Rafael Roque | Kevin Brown | Rafael Roque | | 596 | 470 | 126 |
| 1998-08-16 | vs MIL | 124 | L 2-4 | 80-44 | 1 | 29,319 | Joey Hamilton | Bill Pulsipher | Bill Pulsipher | Joey Hamilton | Bob Wickman | 598 | 474 | 124 |
| 1998-08-18 | @ FLO | 125 | W 7-5 | 81-44 | 1 | 23,275 | Andy Ashby | Kirt Ojala | Dan Miceli | Antonio Alfonseca | Trevor Hoffman | 605 | 479 | 126 |
| 1998-08-19 | @ FLO | 126 | L 0-6 | 81-45 | 1 | 15,409 | Sterling Hitchcock | Brian Meadows | Brian Meadows | Sterling Hitchcock | | 605 | 485 | 120 |
| 1998-08-20 | @ ATL | 127 | W 2-0 | 82-45 | 1 | 43,730 | Kevin Brown | Kevin Millwood | Kevin Brown | Kevin Millwood | Trevor Hoffman | 607 | 485 | 122 |
| 1998-08-21 | @ ATL | 128 | L 4-5 | 82-46 | 1 | 48,268 | Joey Hamilton | John Smoltz | John Smoltz | Joey Hamilton | Kerry Ligtenberg | 611 | 490 | 121 |
| 1998-08-22 | @ MIL | 129 | L 4-8 | 82-47 | 1 | 26,253 | Mark Langston | Rafael Roque | Rafael Roque | Mark Langston | Bob Wickman | 615 | 498 | 117 |
| 1998-08-23 | @ MIL | 130 | W 13-11 | 83-47 | 1 | 27,641 | Andy Ashby | Brad Woodall | Trevor Hoffman | Bob Wickman | | 628 | 509 | 119 |
| 1998-08-24 | @ MIL | 131 | W 7-2 | 84-47 | 1 | 14,121 | Sterling Hitchcock | Steve Woodard | Sterling Hitchcock | Steve Woodard | | 635 | 511 | 124 |
| 1998-08-25 | @ PHI | 132 | W 5-3 | 85-47 | 1 | 18,100 | Kevin Brown | Curt Schilling | Kevin Brown | Curt Schilling | Trevor Hoffman | 640 | 514 | 126 |
| 1998-08-26 | @ PHI | 133 | W 2-0 | 86-47 | 1 | 15,656 | Joey Hamilton | Mark Portugal | Joey Hamilton | Mark Portugal | Trevor Hoffman | 642 | 514 | 128 |
| 1998-08-27 | @ PHI | 134 | W 8-1 | 87-47 | 1 | 23,371 | Stan Spencer | Paul Byrd | Stan Spencer | Paul Byrd | | 650 | 515 | 135 |
| 1998-08-28 | vs MON | 135 | W 12-8 | 88-47 | 1 | 21,518 | Andy Ashby | Javier Vazquez | Donne Wall | Mike Maddux | | 662 | 523 | 139 |
| 1998-08-29 | vs MON | 136 | L 1-3 | 88-48 | 1 | 52,661 | Sterling Hitchcock | Dustin Hermanson | Dustin Hermanson | Sterling Hitchcock | Ugueth Urbina | 663 | 526 | 137 |
| 1998-08-30 | vs MON | 137 | L 1-2 | 88-49 | 1 | 21,765 | Kevin Brown | Mike Thurman | Kirk Bullinger | Kevin Brown | Ugueth Urbina | 664 | 528 | 136 |
| 1998-08-31 | vs MON | 138 | W 5-2 | 89-49 | 1 | 13,449 | Joey Hamilton | Carl Pavano | Joey Hamilton | Carl Pavano | Trevor Hoffman | 669 | 530 | 139 |
| 1998-09-01 | vs NYN | 139 | W 9-8 | 90-49 | 1 | 18,489 | Stan Spencer | Hideo Nomo | Randy Myers | Turk Wendell | Trevor Hoffman | 678 | 538 | 140 |
| 1998-09-02 | vs NYN | 140 | L 1-4 | 90-50 | 1 | 17,565 | Andy Ashby | Armando Reynoso | Armando Reynoso | Andy Ashby | John Franco | 679 | 542 | 137 |
| 1998-09-04 | @ COL | 141 | L 5-11 | 90-51 | 1 | 44,596 | Sterling Hitchcock | Bobby Jones | Dave Veres | Scott Sanders | | 684 | 553 | 131 |
| 1998-09-05 | @ COL | 142 | W 4-2 | 91-51 | 1 | 42,930 | Kevin Brown | Darryl Kile | Kevin Brown | Darryl Kile | Trevor Hoffman | 688 | 555 | 133 |
| 1998-09-06 | @ COL | 143 | L 2-12 | 91-52 | 1 | 46,240 | Joey Hamilton | Jamey Wright | Jamey Wright | Joey Hamilton | | 690 | 567 | 123 |
| 1998-09-07 | vs SFN | 144 | L 4-5 | 91-53 | 1 | 19,393 | Stan Spencer | Russ Ortiz | Julian Tavarez | Randy Myers | Robb Nen | 694 | 572 | 122 |
| 1998-09-08 | vs SFN | 145 | L 1-5 | 91-54 | 1 | 19,362 | Andy Ashby | Kirk Rueter | Kirk Rueter | Andy Ashby | | 695 | 577 | 118 |
| 1998-09-09 | vs SFN | 146 | W 8-3 | 92-54 | 1 | 26,589 | Sterling Hitchcock | Shawn Estes | Sterling Hitchcock | Shawn Estes | Trevor Hoffman | 703 | 580 | 123 |
| 1998-09-10 | vs LAN | 147 | L 3-4 | 92-55 | 1 | 26,018 | Kevin Brown | Chan Ho Park | Chan Ho Park | Kevin Brown | Jeff Shaw | 706 | 584 | 122 |
| 1998-09-11 | vs LAN | 148 | W 1-0 | 93-55 | 1 | 32,830 | Joey Hamilton | Brian Bohanon | Joey Hamilton | Brian Bohanon | Trevor Hoffman | 707 | 584 | 123 |
| 1998-09-12 | vs LAN | 149 | W 8-7 | 94-55 | 1 | 60,823 | Stan Spencer | Dave Mlicki | Scott Sanders | Sean Maloney | Trevor Hoffman | 715 | 591 | 124 |
| 1998-09-13 | vs LAN | 150 | L 4-5 | 94-56 | 1 | 37,390 | Matt Clement | Ismael Valdez | Eric Weaver | Donne Wall | Jeff Shaw | 719 | 596 | 123 |
| 1998-09-14 | vs CHN | 151 | W 4-3 | 95-56 | 1 | 23,948 | Sterling Hitchcock | Mark Clark | Dan Miceli | Matt Karchner | Trevor Hoffman | 723 | 599 | 124 |
| 1998-09-15 | vs CHN | 152 | L 2-4 | 95-57 | 1 | 37,995 | Kevin Brown | Kevin Tapani | Kevin Tapani | Kevin Brown | Rod Beck | 725 | 603 | 122 |
| 1998-09-16 | vs CHN | 153 | L 3-6 | 95-58 | 1 | 49,981 | Joey Hamilton | Terry Mulholland | Terry Mulholland | Dan Miceli | Rod Beck | 728 | 609 | 119 |
| 1998-09-17 | vs CHN | 154 | L 3-4 | 95-59 | 1 | 32,047 | Stan Spencer | Mike Morgan | Felix Heredia | Trevor Hoffman | Rod Beck | 731 | 613 | 118 |
| 1998-09-18 | vs COL | 155 | L 1-4 | 95-60 | 1 | 28,158 | Andy Ashby | Pedro Astacio | Pedro Astacio | Andy Ashby | Dave Veres | 732 | 617 | 115 |
| 1998-09-19 | vs COL | 156 | W 4-1 | 96-60 | 1 | 54,042 | Matt Clement | John Thomson | Matt Clement | John Thomson | Trevor Hoffman | 736 | 618 | 118 |
| 1998-09-20 | vs COL | 157 | L 0-1 | 96-61 | 1 | 37,939 | Kevin Brown | Darryl Kile | Darryl Kile | Randy Myers | Dave Veres | 736 | 619 | 117 |
| 1998-09-22 | @ LAN | 158 | L 2-3 | 96-62 | 1 | 29,255 | Joey Hamilton | Chan Ho Park | Chan Ho Park | Joey Hamilton | Jeff Shaw | 738 | 622 | 116 |
| 1998-09-23 | @ LAN | 159 | W 3-2 | 97-62 | 1 | 29,163 | Andy Ashby | Brian Bohanon | Andy Ashby | Brian Bohanon | Trevor Hoffman | 741 | 624 | 117 |
| 1998-09-25 | @ ARI | 160 | L 3-6 | 97-63 | 1 | 47,288 | Kevin Brown | Brian Anderson | Gregg Olson | Randy Myers | | 744 | 630 | 114 |
| 1998-09-26 | @ ARI | 161 | L 2-3 | 97-64 | 1 | 48,196 | Sterling Hitchcock | Amaury Telemaco | Amaury Telemaco | Sterling Hitchcock | Gregg Olson | 746 | 633 | 113 |
| 1998-09-27 | @ ARI | 162 | W 3-2 | 98-64 | 1 | 48,390 | Joey Hamilton | Andy Benes | Matt Clement | Aaron Small | Trevor Hoffman | 749 | 635 | 114 |