| 1998-04-01 | vs PIT | 1 | L 0-4 | 0-1 | 4 | 31,220 | Carlos Perez | Francisco Cordova | Francisco Cordova | Carlos Perez | | 0 | 4 | -4 |
| 1998-04-02 | vs PIT | 2 | L 3-4 | 0-2 | 5 | 6,396 | Dustin Hermanson | Jason Schmidt | Jason Schmidt | Mike Maddux | Rich Loiselle | 3 | 8 | -5 |
| 1998-04-03 | @ CHN | 3 | L 2-6 | 0-3 | 5 | 39,102 | Javier Vazquez | Steve Trachsel | Steve Trachsel | Javier Vazquez | Rod Beck | 5 | 14 | -9 |
| 1998-04-04 | @ CHN | 4 | L 1-3 | 0-4 | 5 | 25,436 | Marc Valdes | Terry Mulholland | Terry Mulholland | Marc Valdes | Rod Beck | 6 | 17 | -11 |
| 1998-04-05 | @ CHN | 5 | L 2-7 | 0-5 | 5 | 21,854 | Trey Moore | Kevin Tapani | Kevin Tapani | Trey Moore | | 8 | 24 | -16 |
| 1998-04-06 | @ CHN | 6 | L 2-3 | 0-6 | 5 | 12,506 | Carlos Perez | Mark Clark | Mark Clark | Carlos Perez | Rod Beck | 10 | 27 | -17 |
| 1998-04-07 | @ MIL | 7 | L 4-6 | 0-7 | 5 | 51,408 | Dustin Hermanson | Scott Karl | Scott Karl | Dustin Hermanson | Doug Jones | 14 | 33 | -19 |
| 1998-04-09 | @ MIL | 8 | W 6-5 | 1-7 | 4 | 6,537 | Javier Vazquez | Steve Woodard | Anthony Telford | Bob Wickman | Ugueth Urbina | 20 | 38 | -18 |
| 1998-04-10 | vs CHN | 9 | L 0-13 | 1-8 | 4 | 9,982 | Marc Valdes | Kevin Tapani | Kevin Tapani | Marc Valdes | | 20 | 51 | -31 |
| 1998-04-11 | vs CHN | 10 | W 5-4 | 2-8 | 4 | 20,218 | Carlos Perez | Mark Clark | Steve Kline | Terry Adams | | 25 | 55 | -30 |
| 1998-04-12 | vs CHN | 11 | W 4-1 | 3-8 | 4 | 18,506 | Dustin Hermanson | Kerry Wood | Dustin Hermanson | Kerry Wood | Ugueth Urbina | 29 | 56 | -27 |
| 1998-04-14 | vs MIL | 12 | L 4-7 | 3-9 | 4 | 7,386 | Javier Vazquez | Scott Karl | Scott Karl | Javier Vazquez | | 33 | 63 | -30 |
| 1998-04-15 | vs MIL | 13 | W 4-3 | 4-9 | 4 | 7,390 | Trey Moore | Jeff Juden | Trey Moore | Jeff Juden | Ugueth Urbina | 37 | 66 | -29 |
| 1998-04-16 | vs MIL | 14 | L 3-5 | 4-10 | 4 | 7,651 | Carlos Perez | Cal Eldred | Doug Jones | Shayne Bennett | | 40 | 71 | -31 |
| 1998-04-17 | @ HOU | 15 | L 3-5 | 4-11 | 4 | 26,485 | Dustin Hermanson | John Halama | John Halama | Dustin Hermanson | Billy Wagner | 43 | 76 | -33 |
| 1998-04-18 | @ HOU | 16 | L 3-4 | 4-12 | 4 | 29,362 | Marc Valdes | Jose Lima | Doug Henry | Miguel Batista | | 46 | 80 | -34 |
| 1998-04-19 | @ HOU | 17 | W 5-4 | 5-12 | 4 | 18,484 | Javier Vazquez | Shane Reynolds | Anthony Telford | Mike Magnante | Ugueth Urbina | 51 | 84 | -33 |
| 1998-04-21 | vs SLN | 18 | L 3-5 | 5-13 | 4 | 7,384 | Trey Moore | Todd Stottlemyre | Todd Stottlemyre | Trey Moore | Jeff Brantley | 54 | 89 | -35 |
| 1998-04-22 | vs SLN | 19 | W 3-2 | 6-13 | 4 | 7,680 | Carlos Perez | Donovan Osborne | Ugueth Urbina | Kent Bottenfield | | 57 | 91 | -34 |
| 1998-04-23 | vs SLN | 20 | W 5-2 | 7-13 | 4 | 7,480 | Dustin Hermanson | Cliff Politte | Dustin Hermanson | Cliff Politte | Ugueth Urbina | 62 | 93 | -31 |
| 1998-04-24 | vs HOU | 21 | L 4-8 | 7-14 | 4 | 8,713 | Marc Valdes | Jose Lima | Jose Lima | Marc Valdes | | 66 | 101 | -35 |
| 1998-04-25 | vs HOU | 22 | L 3-4 | 7-15 | 4 | 8,489 | Javier Vazquez | Shane Reynolds | Mike Magnante | Ugueth Urbina | Billy Wagner | 69 | 105 | -36 |
| 1998-04-26 | vs HOU | 23 | L 0-15 | 7-16 | 5 | 9,889 | Trey Moore | Sean Bergman | Sean Bergman | Trey Moore | Trever Miller | 69 | 120 | -51 |
| 1998-04-27 | @ SLN | 24 | L 0-7 | 7-17 | 5 | 24,548 | Carlos Perez | Donovan Osborne | Donovan Osborne | Carlos Perez | | 69 | 127 | -58 |
| 1998-04-29 | @ SLN | 25 | L 7-13 | 7-18 | 5 | 29,733 | Miguel Batista | Kent Mercker | Mike Busby | Steve Kline | | 76 | 140 | -64 |
| 1998-05-01 | vs ARI | 26 | W 7-4 | 8-18 | 5 | 6,952 | Javier Vazquez | Brian Anderson | Javier Vazquez | Brian Anderson | Ugueth Urbina | 83 | 144 | -61 |
| 1998-05-02 | vs ARI | 27 | W 5-4 | 9-18 | 5 | 8,026 | Carlos Perez | Andy Benes | Shayne Bennett | Russ Springer | | 88 | 148 | -60 |
| 1998-05-03 | vs ARI | 28 | W 4-1 | 10-18 | 5 | 10,467 | Dustin Hermanson | Willie Blair | Dustin Hermanson | Willie Blair | | 92 | 149 | -57 |
| 1998-05-04 | vs CIN | 29 | L 1-4 | 10-19 | 5 | 6,616 | Trey Moore | Scott Winchester | Scott Winchester | Trey Moore | Jeff Shaw | 93 | 153 | -60 |
| 1998-05-05 | vs CIN | 30 | W 3-2 | 11-19 | 4 | 6,549 | Miguel Batista | Pete Harnisch | Ugueth Urbina | Stan Belinda | | 96 | 155 | -59 |
| 1998-05-06 | vs CIN | 31 | L 2-4 | 11-20 | 4 | 7,261 | Javier Vazquez | Mike Remlinger | Mike Remlinger | Javier Vazquez | Jeff Shaw | 98 | 159 | -61 |
| 1998-05-07 | vs COL | 32 | W 2-1 | 12-20 | 4 | 7,075 | Carlos Perez | Jamey Wright | Carlos Perez | Jamey Wright | Ugueth Urbina | 100 | 160 | -60 |
| 1998-05-08 | vs COL | 33 | L 5-7 | 12-21 | 4 | 11,725 | Dustin Hermanson | Pedro Astacio | Pedro Astacio | Dustin Hermanson | Jerry DiPoto | 105 | 167 | -62 |
| 1998-05-09 | vs COL | 34 | W 4-0 | 13-21 | 4 | 12,014 | Trey Moore | John Thomson | Trey Moore | John Thomson | Ugueth Urbina | 109 | 167 | -58 |
| 1998-05-10 | vs COL | 35 | L 3-5 | 13-22 | 4 | 10,041 | Miguel Batista | Darryl Kile | Darryl Kile | Steve Kline | Jerry DiPoto | 112 | 172 | -60 |
| 1998-05-11 | @ SFN | 36 | L 2-7 | 13-23 | 4 | 8,243 | Javier Vazquez | Kirk Rueter | Kirk Rueter | Javier Vazquez | | 114 | 179 | -65 |
| 1998-05-13 | @ SFN | 37 | W 9-5 | 14-23 | 4 | 10,244 | Carlos Perez | Mark Gardner | Carlos Perez | Mark Gardner | | 123 | 184 | -61 |
| 1998-05-14 | @ SFN | 38 | L 1-6 | 14-25 | 4 | 0 | Dustin Hermanson | Shawn Estes | Shawn Estes | Dustin Hermanson | Julian Tavarez | 124 | 190 | -66 |
| 1998-05-14 | @ SFN | 39 | L 0-2 | 14-25 | 4 | 12,055 | Trey Moore | Danny Darwin | Danny Darwin | Trey Moore | Robb Nen | 124 | 192 | -68 |
| 1998-05-15 | @ LAN | 40 | W 4-2 | 15-25 | 4 | 46,056 | Miguel Batista | Ismael Valdez | Miguel Batista | Ismael Valdez | Ugueth Urbina | 128 | 194 | -66 |
| 1998-05-16 | @ LAN | 41 | L 4-9 | 15-26 | 4 | 51,698 | Javier Vazquez | Darren Dreifort | Darren Dreifort | Javier Vazquez | | 132 | 203 | -71 |
| 1998-05-17 | @ LAN | 42 | L 3-6 | 15-27 | 4 | 45,382 | Mike Johnson | Ramon Martinez | Ramon Martinez | Mike Johnson | Scott Radinsky | 135 | 209 | -74 |
| 1998-05-19 | vs HOU | 43 | W 4-2 | 16-27 | 4 | 9,126 | Carlos Perez | Pete Schourek | Carlos Perez | Pete Schourek | Ugueth Urbina | 139 | 211 | -72 |
| 1998-05-20 | vs HOU | 44 | L 3-4 | 16-28 | 4 | 8,372 | Trey Moore | Jose Lima | Doug Henry | Anthony Telford | Billy Wagner | 142 | 215 | -73 |
| 1998-05-21 | vs HOU | 45 | L 0-6 | 16-29 | 4 | 7,601 | Miguel Batista | Shane Reynolds | Shane Reynolds | Shayne Bennett | | 142 | 221 | -79 |
| 1998-05-22 | vs PHI | 46 | L 5-7 | 16-30 | 4 | 11,588 | Javier Vazquez | Matt Beech | Wayne Gomes | Anthony Telford | Mark Leiter | 147 | 228 | -81 |
| 1998-05-23 | vs PHI | 47 | W 3-2 | 17-30 | 4 | 15,663 | Carl Pavano | Curt Schilling | Ugueth Urbina | Curt Schilling | | 150 | 230 | -80 |
| 1998-05-24 | vs PHI | 48 | W 5-4 | 18-30 | 4 | 14,164 | Carlos Perez | Tyler Green | Carlos Perez | Jerry Spradlin | Ugueth Urbina | 155 | 234 | -79 |
| 1998-05-25 | vs PHI | 49 | L 3-5 | 18-31 | 4 | 9,621 | Trey Moore | Mark Portugal | Wayne Gomes | Shayne Bennett | Jerry Spradlin | 158 | 239 | -81 |
| 1998-05-26 | @ ATL | 50 | L 3-9 | 18-32 | 4 | 28,662 | Miguel Batista | Denny Neagle | Denny Neagle | Miguel Batista | | 161 | 248 | -87 |
| 1998-05-27 | @ ATL | 51 | L 0-2 | 18-33 | 4 | 32,834 | Javier Vazquez | Greg Maddux | Greg Maddux | Javier Vazquez | Kerry Ligtenberg | 161 | 250 | -89 |
| 1998-05-28 | @ ATL | 52 | W 9-5 | 19-33 | 4 | 31,416 | Carl Pavano | Dennis Martinez | Mike Maddux | Mark Wohlers | | 170 | 255 | -85 |
| 1998-05-29 | @ PIT | 53 | W 4-1 | 20-33 | 4 | 17,053 | Carlos Perez | Jon Lieber | Carlos Perez | Jon Lieber | Ugueth Urbina | 174 | 256 | -82 |
| 1998-05-30 | @ PIT | 54 | L 7-8 | 20-34 | 4 | 38,149 | Trey Moore | Jose Silva | Jason Christiansen | Ugueth Urbina | | 181 | 264 | -83 |
| 1998-05-31 | @ PIT | 55 | L 4-9 | 20-35 | 4 | 24,718 | Miguel Batista | Francisco Cordova | Francisco Cordova | Miguel Batista | | 185 | 273 | -88 |
| 1998-06-01 | @ PHI | 56 | L 2-6 | 20-36 | 4 | 16,704 | Javier Vazquez | Mike Grace | Wayne Gomes | Mike Maddux | | 187 | 279 | -92 |
| 1998-06-02 | @ PHI | 57 | W 4-3 | 21-36 | 4 | 13,606 | Carl Pavano | Curt Schilling | Carl Pavano | Curt Schilling | Ugueth Urbina | 191 | 282 | -91 |
| 1998-06-03 | @ PHI | 58 | W 3-2 | 22-36 | 4 | 13,592 | Carlos Perez | Matt Beech | Carlos Perez | Wayne Gomes | | 194 | 284 | -90 |
| 1998-06-05 | @ TBA | 59 | W 5-2 | 23-36 | 4 | 24,025 | Dustin Hermanson | Rick White | Dustin Hermanson | Rick White | | 199 | 286 | -87 |
| 1998-06-06 | @ TBA | 60 | W 7-5 | 24-36 | 4 | 26,501 | Trey Moore | Rolando Arrojo | Anthony Telford | Matt Ruebel | Ugueth Urbina | 206 | 291 | -85 |
| 1998-06-07 | @ TBA | 61 | L 3-4 | 24-37 | 4 | 26,334 | Javier Vazquez | Jason Johnson | Albie Lopez | Steve Kline | | 209 | 295 | -86 |
| 1998-06-09 | vs NYA | 62 | L 1-11 | 24-38 | 4 | 16,238 | Carlos Perez | Orlando Hernandez | Orlando Hernandez | Carlos Perez | | 210 | 306 | -96 |
| 1998-06-10 | vs NYA | 63 | L 2-6 | 24-39 | 4 | 14,335 | Dustin Hermanson | Hideki Irabu | Hideki Irabu | Dustin Hermanson | | 212 | 312 | -100 |
| 1998-06-11 | vs NYA | 64 | W 7-5 | 25-39 | 4 | 16,036 | Carl Pavano | Andy Pettitte | Marc Valdes | Jeff Nelson | Ugueth Urbina | 219 | 317 | -98 |
| 1998-06-12 | @ ATL | 65 | W 7-5 | 26-39 | 4 | 45,942 | Javier Vazquez | Greg Maddux | Miguel Batista | Mike Cather | Ugueth Urbina | 226 | 322 | -96 |
| 1998-06-13 | @ ATL | 66 | L 7-9 | 26-40 | 4 | 48,943 | Mike Johnson | Tom Glavine | Tom Glavine | Mike Johnson | Dennis Martinez | 233 | 331 | -98 |
| 1998-06-14 | @ ATL | 67 | L 1-5 | 26-41 | 4 | 46,543 | Carlos Perez | Kevin Millwood | Kevin Millwood | Carlos Perez | | 234 | 336 | -102 |
| 1998-06-16 | vs NYN | 68 | L 0-2 | 26-42 | 4 | 12,662 | Dustin Hermanson | Al Leiter | Al Leiter | Dustin Hermanson | | 234 | 338 | -104 |
| 1998-06-17 | vs NYN | 69 | W 5-4 | 27-42 | 4 | 7,606 | Carl Pavano | Bobby Jones | Ugueth Urbina | Mel Rojas | | 239 | 342 | -103 |
| 1998-06-18 | vs NYN | 70 | W 7-6 | 28-42 | 4 | 8,788 | Javier Vazquez | Masato Yoshii | Shayne Bennett | Masato Yoshii | Ugueth Urbina | 246 | 348 | -102 |
| 1998-06-19 | vs ATL | 71 | W 14-1 | 29-42 | 4 | 10,364 | Shawn Boskie | Kevin Millwood | Shawn Boskie | Kevin Millwood | | 260 | 349 | -89 |
| 1998-06-20 | vs ATL | 72 | L 1-5 | 29-43 | 4 | 11,139 | Carlos Perez | John Smoltz | John Smoltz | Carlos Perez | | 261 | 354 | -93 |
| 1998-06-21 | vs ATL | 73 | W 4-1 | 30-43 | 4 | 12,265 | Dustin Hermanson | Denny Neagle | Dustin Hermanson | Denny Neagle | Ugueth Urbina | 265 | 355 | -90 |
| 1998-06-22 | @ TOR | 74 | L 2-14 | 30-44 | 4 | 33,132 | Carl Pavano | Juan Guzman | Juan Guzman | Carl Pavano | | 267 | 369 | -102 |
| 1998-06-23 | @ TOR | 75 | L 2-3 | 30-45 | 4 | 33,492 | Javier Vazquez | Chris Carpenter | Chris Carpenter | Miguel Batista | Randy Myers | 269 | 372 | -103 |
| 1998-06-24 | vs TOR | 76 | L 6-7 | 30-46 | 4 | 16,515 | Shawn Boskie | Roger Clemens | Roger Clemens | Shawn Boskie | Randy Myers | 275 | 379 | -104 |
| 1998-06-25 | vs TOR | 77 | L 0-1 | 30-47 | 4 | 9,256 | Carlos Perez | Woody Williams | Woody Williams | Carlos Perez | | 275 | 380 | -105 |
| 1998-06-26 | vs BAL | 78 | W 9-4 | 31-47 | 4 | 9,116 | Dustin Hermanson | Sidney Ponson | Dustin Hermanson | Sidney Ponson | | 284 | 384 | -100 |
| 1998-06-27 | vs BAL | 79 | W 3-1 | 32-47 | 4 | 11,556 | Carl Pavano | Mike Mussina | Carl Pavano | Mike Mussina | Ugueth Urbina | 287 | 385 | -98 |
| 1998-06-28 | vs BAL | 80 | W 8-4 | 33-47 | 4 | 16,145 | Javier Vazquez | Doug Drabek | Javier Vazquez | Doug Drabek | Ugueth Urbina | 295 | 389 | -94 |
| 1998-06-30 | @ BOS | 81 | L 4-7 | 33-48 | 4 | 27,704 | Carlos Perez | Steve Avery | Steve Avery | Carlos Perez | Tom Gordon | 299 | 396 | -97 |
| 1998-07-01 | @ BOS | 82 | L 1-6 | 33-49 | 4 | 24,923 | Dustin Hermanson | Bret Saberhagen | Bret Saberhagen | Dustin Hermanson | | 300 | 402 | -102 |
| 1998-07-02 | @ BOS | 83 | L 0-15 | 33-50 | 4 | 32,637 | Carl Pavano | Pedro Martinez | Pedro Martinez | Carl Pavano | | 300 | 417 | -117 |
| 1998-07-03 | vs FLO | 84 | W 8-4 | 34-50 | 4 | 10,048 | Javier Vazquez | Jesus Sanchez | Javier Vazquez | Jesus Sanchez | | 308 | 421 | -113 |
| 1998-07-04 | vs FLO | 85 | L 2-3 | 34-51 | 4 | 8,362 | Shawn Boskie | Ryan Dempster | Brian Edmondson | Shawn Boskie | Antonio Alfonseca | 310 | 424 | -114 |
| 1998-07-05 | vs FLO | 86 | L 1-2 | 34-52 | 4 | 10,483 | Carlos Perez | Brian Meadows | Brian Meadows | Carlos Perez | Antonio Alfonseca | 311 | 426 | -115 |
| 1998-07-09 | @ NYN | 87 | W 9-8 | 35-52 | 4 | 27,193 | Dustin Hermanson | Bobby Jones | Mike Maddux | John Franco | Ugueth Urbina | 320 | 434 | -114 |
| 1998-07-10 | @ NYN | 88 | W 8-6 | 36-52 | 4 | 36,538 | Carlos Perez | Masato Yoshii | Shayne Bennett | John Franco | Ugueth Urbina | 328 | 440 | -112 |
| 1998-07-11 | @ NYN | 89 | L 4-8 | 36-53 | 4 | 48,006 | Carl Pavano | Rick Reed | Rick Reed | Carl Pavano | | 332 | 448 | -116 |
| 1998-07-12 | @ NYN | 90 | L 2-5 | 36-54 | 4 | 51,568 | Javier Vazquez | Hideo Nomo | Jeff Tam | Javier Vazquez | Dennis Cook | 334 | 453 | -119 |
| 1998-07-13 | @ FLO | 91 | L 7-8 | 36-55 | 4 | 11,716 | Shawn Boskie | Eric Ludwick | Antonio Alfonseca | Anthony Telford | | 341 | 461 | -120 |
| 1998-07-14 | @ FLO | 92 | W 2-1 | 37-55 | 4 | 11,866 | Dustin Hermanson | Livan Hernandez | Dustin Hermanson | Livan Hernandez | Ugueth Urbina | 343 | 462 | -119 |
| 1998-07-15 | @ FLO | 93 | W 9-5 | 38-55 | 4 | 15,672 | Carlos Perez | Jesus Sanchez | Carlos Perez | Brian Edmondson | | 352 | 467 | -115 |
| 1998-07-16 | vs PIT | 94 | W 10-5 | 39-55 | 4 | 8,558 | Carl Pavano | Jason Schmidt | Carl Pavano | Jason Schmidt | Mike Maddux | 362 | 472 | -110 |
| 1998-07-17 | vs PIT | 95 | L 1-5 | 39-56 | 4 | 9,380 | Javier Vazquez | Mike Williams | Mike Williams | Javier Vazquez | Jason Christiansen | 363 | 477 | -114 |
| 1998-07-18 | vs PIT | 96 | L 2-5 | 39-57 | 4 | 11,499 | Shawn Boskie | Jon Lieber | Jon Lieber | Shawn Boskie | | 365 | 482 | -117 |
| 1998-07-19 | vs PIT | 97 | L 1-6 | 39-58 | 4 | 17,558 | Dustin Hermanson | Chris Peters | Chris Peters | Dustin Hermanson | | 366 | 488 | -122 |
| 1998-07-20 | vs PHI | 98 | L 1-3 | 39-59 | 4 | 9,792 | Carlos Perez | Curt Schilling | Curt Schilling | Carlos Perez | | 367 | 491 | -124 |
| 1998-07-21 | vs PHI | 99 | L 2-3 | 39-60 | 4 | 10,816 | Carl Pavano | Mark Portugal | Mark Portugal | Carl Pavano | | 369 | 494 | -125 |
| 1998-07-22 | @ CHN | 100 | L 5-9 | 39-61 | 4 | 39,179 | Javier Vazquez | Steve Trachsel | Terry Adams | Miguel Batista | Rod Beck | 374 | 503 | -129 |
| 1998-07-23 | @ CHN | 101 | L 1-2 | 39-62 | 4 | 39,262 | Jeremy Powell | Mark Clark | Mark Clark | Jeremy Powell | Rod Beck | 375 | 505 | -130 |
| 1998-07-24 | @ MIL | 102 | L 7-10 | 40-63 | 4 | 0 | Dustin Hermanson | Jeff Juden | David Weathers | Dustin Hermanson | | 382 | 515 | -133 |
| 1998-07-24 | @ MIL | 103 | W 11-2 | 40-63 | 4 | 16,297 | Mike Thurman | Paul Wagner | Mike Thurman | Paul Wagner | | 393 | 517 | -124 |
| 1998-07-25 | @ MIL | 104 | L 3-4 | 40-64 | 4 | 28,074 | Carlos Perez | Scott Karl | Bob Wickman | Anthony Telford | | 396 | 521 | -125 |
| 1998-07-26 | @ MIL | 105 | L 5-6 | 40-65 | 4 | 24,553 | Carl Pavano | Cal Eldred | Bob Wickman | Shayne Bennett | | 401 | 527 | -126 |
| 1998-07-28 | vs SFN | 106 | L 1-7 | 40-66 | 4 | 9,543 | Javier Vazquez | Kirk Rueter | Kirk Rueter | Javier Vazquez | | 402 | 534 | -132 |
| 1998-07-29 | vs SFN | 107 | W 6-0 | 41-66 | 4 | 8,293 | Dustin Hermanson | Danny Darwin | Dustin Hermanson | Danny Darwin | | 408 | 534 | -126 |
| 1998-07-30 | vs SFN | 108 | W 12-6 | 42-66 | 4 | 7,575 | Mike Thurman | Mark Gardner | Mike Thurman | Mark Gardner | Shayne Bennett | 420 | 540 | -120 |
| 1998-07-31 | vs SDN | 109 | L 4-5 | 42-67 | 4 | 10,340 | Carl Pavano | Kevin Brown | Kevin Brown | Carl Pavano | Trevor Hoffman | 424 | 545 | -121 |
| 1998-08-01 | vs SDN | 110 | W 4-2 | 43-67 | 4 | 28,937 | Miguel Batista | Mark Langston | Shayne Bennett | Mark Langston | Ugueth Urbina | 428 | 547 | -119 |
| 1998-08-02 | vs SDN | 111 | L 1-4 | 43-68 | 4 | 14,485 | Javier Vazquez | Andy Ashby | Andy Ashby | Javier Vazquez | Trevor Hoffman | 429 | 551 | -122 |
| 1998-08-03 | vs SDN | 112 | W 6-1 | 44-68 | 4 | 10,129 | Dustin Hermanson | Brian Boehringer | Dustin Hermanson | Brian Boehringer | | 435 | 552 | -117 |
| 1998-08-04 | vs LAN | 113 | W 5-4 | 45-68 | 4 | 10,515 | Mike Thurman | Chan Ho Park | Steve Kline | Darren Hall | | 440 | 556 | -116 |
| 1998-08-05 | vs LAN | 114 | W 5-1 | 46-68 | 4 | 9,611 | Carl Pavano | Darren Dreifort | Carl Pavano | Darren Dreifort | Ugueth Urbina | 445 | 557 | -112 |
| 1998-08-06 | vs LAN | 115 | W 9-0 | 47-68 | 4 | 11,791 | Jeremy Powell | Carlos Perez | Jeremy Powell | Carlos Perez | | 454 | 557 | -103 |
| 1998-08-07 | vs ARI | 116 | L 4-6 | 47-69 | 4 | 9,798 | Javier Vazquez | Brian Anderson | Brian Anderson | Javier Vazquez | Gregg Olson | 458 | 563 | -105 |
| 1998-08-08 | vs ARI | 117 | W 5-3 | 48-69 | 4 | 10,717 | Dustin Hermanson | Amaury Telemaco | Dustin Hermanson | Amaury Telemaco | Ugueth Urbina | 463 | 566 | -103 |
| 1998-08-09 | vs ARI | 118 | W 8-2 | 49-69 | 4 | 21,804 | Mike Thurman | Bob Wolcott | Shayne Bennett | Bob Wolcott | Steve Kline | 471 | 568 | -97 |
| 1998-08-10 | @ COL | 119 | L 2-6 | 49-70 | 4 | 44,768 | Carl Pavano | Jamey Wright | Jamey Wright | Anthony Telford | | 473 | 574 | -101 |
| 1998-08-11 | @ COL | 120 | L 6-15 | 49-71 | 4 | 45,403 | Jeremy Powell | John Thomson | John Thomson | Jeremy Powell | | 479 | 589 | -110 |
| 1998-08-12 | @ COL | 121 | L 2-3 | 49-72 | 4 | 46,872 | Javier Vazquez | Pedro Astacio | Pedro Astacio | Javier Vazquez | Jerry DiPoto | 481 | 592 | -111 |
| 1998-08-14 | @ CIN | 122 | L 2-3 | 49-73 | 4 | 19,532 | Dustin Hermanson | Dennys Reyes | Gabe White | Steve Kline | | 483 | 595 | -112 |
| 1998-08-15 | @ CIN | 123 | L 4-6 | 49-74 | 4 | 24,452 | Mike Thurman | Steve Parris | Steve Parris | Mike Thurman | Gabe White | 487 | 601 | -114 |
| 1998-08-16 | @ CIN | 124 | L 1-8 | 49-75 | 4 | 31,073 | Carl Pavano | Brett Tomko | Brett Tomko | Carl Pavano | | 488 | 609 | -121 |
| 1998-08-17 | @ ARI | 125 | L 1-6 | 49-76 | 4 | 39,367 | Jeremy Powell | Andy Benes | Andy Benes | Jeremy Powell | | 489 | 615 | -126 |
| 1998-08-18 | @ ARI | 126 | W 7-1 | 50-76 | 4 | 40,012 | Javier Vazquez | Brian Anderson | Javier Vazquez | Brian Anderson | | 496 | 616 | -120 |
| 1998-08-19 | @ ARI | 127 | W 8-2 | 51-76 | 4 | 39,906 | Dustin Hermanson | Amaury Telemaco | Dustin Hermanson | Amaury Telemaco | | 504 | 618 | -114 |
| 1998-08-20 | vs COL | 128 | L 3-6 | 51-77 | 4 | 11,680 | Mike Thurman | Darryl Kile | Darryl Kile | Mike Thurman | Mike DeJean | 507 | 624 | -117 |
| 1998-08-21 | vs COL | 129 | L 2-3 | 51-78 | 4 | 11,626 | Carl Pavano | Jamey Wright | Dave Veres | Ugueth Urbina | | 509 | 627 | -118 |
| 1998-08-22 | vs CIN | 130 | L 0-4 | 51-79 | 4 | 12,795 | Jeremy Powell | Steve Parris | Steve Parris | Jeremy Powell | | 509 | 631 | -122 |
| 1998-08-23 | vs CIN | 131 | L 0-10 | 51-80 | 4 | 14,371 | Javier Vazquez | Jason Bere | Jason Bere | Javier Vazquez | | 509 | 641 | -132 |
| 1998-08-24 | vs CIN | 132 | L 1-8 | 51-81 | 4 | 7,537 | Dustin Hermanson | Pete Harnisch | Pete Harnisch | Dustin Hermanson | | 510 | 649 | -139 |
| 1998-08-25 | @ LAN | 133 | L 3-4 | 51-82 | 4 | 30,183 | Mike Thurman | Dave Mlicki | Dave Mlicki | Mike Thurman | Jeff Shaw | 513 | 653 | -140 |
| 1998-08-26 | @ LAN | 134 | L 3-4 | 51-83 | 4 | 34,039 | Carl Pavano | Chan Ho Park | Jeff Shaw | Steve Kline | | 516 | 657 | -141 |
| 1998-08-27 | @ LAN | 135 | L 9-10 | 51-84 | 4 | 30,971 | Jeremy Powell | Darren Dreifort | Darren Dreifort | Jeremy Powell | Scott Radinsky | 525 | 667 | -142 |
| 1998-08-28 | @ SDN | 136 | L 8-12 | 51-85 | 4 | 21,518 | Javier Vazquez | Andy Ashby | Donne Wall | Mike Maddux | | 533 | 679 | -146 |
| 1998-08-29 | @ SDN | 137 | W 3-1 | 52-85 | 4 | 52,661 | Dustin Hermanson | Sterling Hitchcock | Dustin Hermanson | Sterling Hitchcock | Ugueth Urbina | 536 | 680 | -144 |
| 1998-08-30 | @ SDN | 138 | W 2-1 | 53-85 | 4 | 21,765 | Mike Thurman | Kevin Brown | Kirk Bullinger | Kevin Brown | Ugueth Urbina | 538 | 681 | -143 |
| 1998-08-31 | @ SDN | 139 | L 2-5 | 53-86 | 4 | 13,449 | Carl Pavano | Joey Hamilton | Joey Hamilton | Carl Pavano | Trevor Hoffman | 540 | 686 | -146 |
| 1998-09-01 | @ SFN | 140 | L 7-9 | 53-87 | 4 | 10,160 | Miguel Batista | Danny Darwin | John Johnstone | Steve Kline | Robb Nen | 547 | 695 | -148 |
| 1998-09-02 | @ SFN | 141 | L 3-12 | 53-88 | 4 | 10,673 | Javier Vazquez | Kirk Rueter | Kirk Rueter | Javier Vazquez | | 550 | 707 | -157 |
| 1998-09-04 | @ FLO | 142 | W 8-0 | 54-88 | 4 | 16,929 | Dustin Hermanson | Brian Meadows | Dustin Hermanson | Brian Meadows | | 558 | 707 | -149 |
| 1998-09-05 | @ FLO | 143 | W 7-1 | 55-88 | 4 | 21,155 | Mike Thurman | Rafael Medina | Mike Thurman | Rafael Medina | | 565 | 708 | -143 |
| 1998-09-06 | @ FLO | 144 | L 2-6 | 55-89 | 4 | 16,961 | Carl Pavano | Kirt Ojala | Kirt Ojala | Carl Pavano | Vic Darensbourg | 567 | 714 | -147 |
| 1998-09-08 | vs ATL | 145 | W 6-3 | 56-89 | 4 | 7,216 | Miguel Batista | Greg Maddux | Miguel Batista | Greg Maddux | Ugueth Urbina | 573 | 717 | -144 |
| 1998-09-09 | vs ATL | 146 | W 3-2 | 57-89 | 4 | 7,842 | Dustin Hermanson | Tom Glavine | Ugueth Urbina | John Rocker | | 576 | 719 | -143 |
| 1998-09-10 | vs ATL | 147 | L 4-7 | 57-90 | 4 | 8,455 | Mike Thurman | Kevin Millwood | Kevin Millwood | Mike Thurman | Kerry Ligtenberg | 580 | 726 | -146 |
| 1998-09-11 | vs NYN | 148 | W 5-1 | 58-90 | 4 | 10,584 | Carl Pavano | Bobby Jones | Carl Pavano | Bobby Jones | Ugueth Urbina | 585 | 727 | -142 |
| 1998-09-12 | vs NYN | 149 | W 5-3 | 59-90 | 4 | 22,047 | Javier Vazquez | Rick Reed | Mike Maddux | Rick Reed | Ugueth Urbina | 590 | 730 | -140 |
| 1998-09-13 | vs NYN | 150 | L 0-1 | 59-91 | 4 | 15,152 | Miguel Batista | Willie Blair | Willie Blair | Anthony Telford | John Franco | 590 | 731 | -141 |
| 1998-09-14 | vs FLO | 151 | W 4-2 | 60-91 | 4 | 11,969 | Dustin Hermanson | Brian Meadows | Dustin Hermanson | Brian Meadows | Ugueth Urbina | 594 | 733 | -139 |
| 1998-09-15 | vs FLO | 152 | L 4-7 | 60-92 | 4 | 6,795 | Mike Thurman | Rafael Medina | Rafael Medina | Mike Thurman | | 598 | 740 | -142 |
| 1998-09-16 | vs FLO | 153 | W 3-2 | 61-92 | 4 | 13,540 | Carl Pavano | Kirt Ojala | Steve Kline | Kirt Ojala | | 601 | 742 | -141 |
| 1998-09-18 | @ PHI | 154 | W 11-4 | 62-92 | 4 | 14,811 | Javier Vazquez | Mark Portugal | Javier Vazquez | Mark Portugal | Anthony Telford | 612 | 746 | -134 |
| 1998-09-19 | @ PHI | 155 | L 3-4 | 62-93 | 4 | 18,701 | Miguel Batista | Curt Schilling | Curt Schilling | Mike Maddux | | 615 | 750 | -135 |
| 1998-09-20 | @ PHI | 156 | L 3-6 | 62-94 | 4 | 26,207 | Dustin Hermanson | Paul Byrd | Paul Byrd | Dustin Hermanson | Ricky Bottalico | 618 | 756 | -138 |
| 1998-09-22 | @ NYN | 157 | W 5-3 | 63-94 | 4 | 32,467 | Mike Thurman | Armando Reynoso | Mike Thurman | Armando Reynoso | Ugueth Urbina | 623 | 759 | -136 |
| 1998-09-23 | @ NYN | 158 | W 3-0 | 64-94 | 4 | 29,728 | Carl Pavano | Bobby Jones | Carl Pavano | Bobby Jones | Ugueth Urbina | 626 | 759 | -133 |
| 1998-09-24 | @ SLN | 159 | L 3-6 | 64-95 | 4 | 41,911 | Javier Vazquez | Donovan Osborne | Donovan Osborne | Javier Vazquez | Juan Acevedo | 629 | 765 | -136 |
| 1998-09-25 | @ SLN | 160 | L 5-6 | 64-96 | 4 | 48,159 | Miguel Batista | Jose Jimenez | Jose Jimenez | Shayne Bennett | Juan Acevedo | 634 | 771 | -137 |
| 1998-09-26 | @ SLN | 161 | W 7-6 | 65-96 | 4 | 48,212 | Dustin Hermanson | Manny Aybar | Ugueth Urbina | Mike Busby | Rick DeHart | 641 | 777 | -136 |
| 1998-09-27 | @ SLN | 162 | L 3-6 | 65-97 | 4 | 46,110 | Mike Thurman | Matt Morris | John Frascatore | Carl Pavano | Juan Acevedo | 644 | 783 | -139 |