| 1998-03-31 | vs MIL | 1 | W 2-1 | 1-0 | 1 | 42,891 | Greg Maddux | Cal Eldred | Kerry Ligtenberg | Bob Wickman | | 2 | 1 | 1 |
| 1998-04-02 | vs MIL | 2 | L 6-8 | 1-1 | 1 | 29,671 | Tom Glavine | Scott Karl | Mike Myers | Adam Butler | | 8 | 9 | -1 |
| 1998-04-03 | vs PHI | 3 | W 5-1 | 2-1 | 1 | 30,020 | Denny Neagle | Mike Grace | Denny Neagle | Mike Grace | | 13 | 10 | 3 |
| 1998-04-04 | vs PHI | 4 | W 5-4 | 3-1 | 1 | 39,154 | Kevin Millwood | Tyler Green | Dennis Martinez | Billy Brewer | Mark Wohlers | 18 | 14 | 4 |
| 1998-04-05 | vs PHI | 5 | L 1-2 | 3-2 | 2 | 35,331 | Greg Maddux | Curt Schilling | Curt Schilling | Greg Maddux | | 19 | 16 | 3 |
| 1998-04-07 | @ PIT | 6 | W 11-3 | 4-2 | 2 | 43,268 | Tom Glavine | Jason Schmidt | Tom Glavine | Jason Schmidt | | 30 | 19 | 11 |
| 1998-04-08 | @ PIT | 7 | L 3-5 | 4-3 | 2 | 11,254 | Denny Neagle | Esteban Loaiza | Esteban Loaiza | Denny Neagle | Rich Loiselle | 33 | 24 | 9 |
| 1998-04-09 | @ PIT | 8 | W 4-3 | 5-3 | 1 | 9,560 | Kevin Millwood | Jon Lieber | Kevin Millwood | Jon Lieber | Mark Wohlers | 37 | 27 | 10 |
| 1998-04-10 | @ PHI | 9 | L 0-1 | 5-4 | 2 | 30,311 | Greg Maddux | Curt Schilling | Curt Schilling | Mike Cather | | 37 | 28 | 9 |
| 1998-04-11 | @ PHI | 10 | L 5-6 | 5-5 | 3 | 17,676 | Dennis Martinez | Tyler Green | Tyler Green | Dennis Martinez | | 42 | 34 | 8 |
| 1998-04-12 | @ PHI | 11 | W 3-2 | 6-5 | 3 | 18,760 | Tom Glavine | Garrett Stephenson | Tom Glavine | Garrett Stephenson | Mark Wohlers | 45 | 36 | 9 |
| 1998-04-13 | @ PHI | 12 | L 8-11 | 6-6 | 3 | 15,101 | Denny Neagle | Matt Beech | Jerry Spradlin | Kerry Ligtenberg | Ricky Bottalico | 53 | 47 | 6 |
| 1998-04-14 | vs PIT | 13 | W 6-0 | 7-6 | 3 | 31,259 | Kevin Millwood | Jon Lieber | Kevin Millwood | Jon Lieber | | 59 | 47 | 12 |
| 1998-04-15 | vs PIT | 14 | W 7-0 | 8-6 | 3 | 30,381 | Greg Maddux | Jose Silva | Greg Maddux | Jose Silva | | 66 | 47 | 19 |
| 1998-04-16 | vs PIT | 15 | W 3-1 | 9-6 | 2 | 35,760 | John Smoltz | Francisco Cordova | John Smoltz | Francisco Cordova | Mark Wohlers | 69 | 48 | 21 |
| 1998-04-18 | @ COL | 16 | W 11-4 | 10-6 | 1 | 48,058 | Denny Neagle | Pedro Astacio | Denny Neagle | Pedro Astacio | | 80 | 52 | 28 |
| 1998-04-19 | @ COL | 17 | W 5-3 | 11-7 | 2 | 48,038 | Kevin Millwood | Mark Thompson | Kevin Millwood | Mark Thompson | Mark Wohlers | 85 | 55 | 30 |
| 1998-04-19 | @ COL | 18 | L 7-10 | 11-7 | 2 | 43,977 | Dennis Martinez | Jamey Wright | Jamey Wright | Dennis Martinez | Jerry DiPoto | 92 | 65 | 27 |
| 1998-04-20 | @ COL | 19 | W 7-5 | 12-7 | 2 | 43,594 | Greg Maddux | Darryl Kile | Greg Maddux | Darryl Kile | Kerry Ligtenberg | 99 | 70 | 29 |
| 1998-04-22 | vs ARI | 20 | W 5-2 | 13-7 | 1 | 30,952 | John Smoltz | Andy Benes | John Smoltz | Andy Benes | | 104 | 72 | 32 |
| 1998-04-23 | vs ARI | 21 | W 3-1 | 14-7 | 1 | 33,013 | Tom Glavine | Willie Blair | Tom Glavine | Willie Blair | Mark Wohlers | 107 | 73 | 34 |
| 1998-04-24 | vs ARI | 22 | W 6-5 | 15-7 | 1 | 41,514 | Denny Neagle | Brian Anderson | Kerry Ligtenberg | Russ Springer | | 113 | 78 | 35 |
| 1998-04-25 | vs COL | 23 | L 7-11 | 15-8 | 1 | 49,161 | Kevin Millwood | Darryl Kile | Darryl Kile | Kevin Millwood | | 120 | 89 | 31 |
| 1998-04-26 | vs COL | 24 | L 6-7 | 15-9 | 1 | 42,400 | Greg Maddux | Jamey Wright | Jamey Wright | Greg Maddux | Jerry DiPoto | 126 | 96 | 30 |
| 1998-04-27 | @ ARI | 25 | W 6-5 | 16-9 | 1 | 47,410 | John Smoltz | Andy Benes | Mike Cather | Omar Daal | Mark Wohlers | 132 | 101 | 31 |
| 1998-04-28 | @ ARI | 26 | W 12-2 | 17-9 | 1 | 47,593 | Tom Glavine | Willie Blair | Tom Glavine | Willie Blair | | 144 | 103 | 41 |
| 1998-04-30 | vs SFN | 27 | W 6-0 | 18-9 | 1 | 31,818 | Denny Neagle | Orel Hershiser | Denny Neagle | Orel Hershiser | | 150 | 103 | 47 |
| 1998-05-01 | vs SFN | 28 | W 6-2 | 19-9 | 1 | 35,777 | Greg Maddux | Kirk Rueter | Greg Maddux | Kirk Rueter | | 156 | 105 | 51 |
| 1998-05-02 | vs SFN | 29 | W 4-3 | 20-9 | 1 | 46,597 | John Smoltz | Mark Gardner | Kerry Ligtenberg | Robb Nen | | 160 | 108 | 52 |
| 1998-05-03 | vs SFN | 30 | L 8-12 | 20-10 | 1 | 36,958 | Tom Glavine | Danny Darwin | Danny Darwin | Tom Glavine | | 168 | 120 | 48 |
| 1998-05-04 | vs LAN | 31 | W 4-2 | 21-10 | 1 | 32,330 | Kevin Millwood | Hideo Nomo | Kevin Millwood | Mark Guthrie | Kerry Ligtenberg | 172 | 122 | 50 |
| 1998-05-05 | vs LAN | 32 | W 8-3 | 22-10 | 1 | 30,310 | Denny Neagle | Ismael Valdez | Denny Neagle | Ismael Valdez | | 180 | 125 | 55 |
| 1998-05-06 | vs LAN | 33 | W 7-0 | 23-10 | 1 | 38,637 | Greg Maddux | Darren Dreifort | Greg Maddux | Darren Dreifort | | 187 | 125 | 62 |
| 1998-05-07 | vs SDN | 34 | W 6-3 | 24-10 | 1 | 31,811 | John Smoltz | Joey Hamilton | John Smoltz | Joey Hamilton | Kerry Ligtenberg | 193 | 128 | 65 |
| 1998-05-08 | vs SDN | 35 | L 2-3 | 24-11 | 1 | 37,490 | Tom Glavine | Andy Ashby | Andy Ashby | Tom Glavine | Trevor Hoffman | 195 | 131 | 64 |
| 1998-05-09 | vs SDN | 36 | W 6-4 | 25-11 | 1 | 46,160 | Kevin Millwood | Sterling Hitchcock | Kevin Millwood | Ben VanRyn | Kerry Ligtenberg | 201 | 135 | 66 |
| 1998-05-10 | vs SDN | 37 | W 8-5 | 26-11 | 1 | 33,376 | Denny Neagle | Pete Smith | Mike Cather | Donne Wall | Kerry Ligtenberg | 209 | 140 | 69 |
| 1998-05-11 | @ CIN | 38 | W 8-1 | 27-11 | 1 | 19,285 | Greg Maddux | Mike Remlinger | Greg Maddux | Mike Remlinger | | 217 | 141 | 76 |
| 1998-05-12 | @ CIN | 39 | W 5-1 | 28-11 | 1 | 19,033 | John Smoltz | David Weathers | John Smoltz | David Weathers | | 222 | 142 | 80 |
| 1998-05-13 | @ SLN | 40 | W 10-2 | 29-11 | 1 | 31,532 | Tom Glavine | Cliff Politte | Tom Glavine | Cliff Politte | | 232 | 144 | 88 |
| 1998-05-14 | @ SLN | 41 | W 7-3 | 30-11 | 1 | 32,119 | Kevin Millwood | Mark Petkovsek | John Rocker | Juan Acevedo | | 239 | 147 | 92 |
| 1998-05-15 | @ HOU | 42 | W 3-2 | 31-11 | 1 | 38,941 | Denny Neagle | Jose Lima | Denny Neagle | Jose Lima | Dennis Martinez | 242 | 149 | 93 |
| 1998-05-16 | @ HOU | 43 | L 2-3 | 31-12 | 1 | 51,526 | Greg Maddux | Shane Reynolds | Doug Henry | Kerry Ligtenberg | | 244 | 152 | 92 |
| 1998-05-17 | @ HOU | 44 | L 1-8 | 31-13 | 1 | 35,250 | John Smoltz | Sean Bergman | Sean Bergman | John Smoltz | | 245 | 160 | 85 |
| 1998-05-18 | @ HOU | 45 | W 4-0 | 32-13 | 1 | 22,119 | Tom Glavine | Mike Hampton | Tom Glavine | Mike Hampton | | 249 | 160 | 89 |
| 1998-05-20 | vs COL | 46 | W 5-1 | 33-13 | 1 | 33,531 | Kevin Millwood | John Thomson | Kevin Millwood | John Thomson | | 254 | 161 | 93 |
| 1998-05-21 | vs COL | 47 | W 2-0 | 34-13 | 1 | 34,611 | Denny Neagle | Darryl Kile | Denny Neagle | Darryl Kile | Kerry Ligtenberg | 256 | 161 | 95 |
| 1998-05-22 | vs CHN | 48 | W 8-2 | 35-13 | 1 | 43,576 | Greg Maddux | Mark Clark | Greg Maddux | Mark Clark | | 264 | 163 | 101 |
| 1998-05-23 | vs CHN | 49 | L 6-10 | 35-14 | 1 | 50,189 | John Smoltz | Kerry Wood | Rod Beck | Brian Edmondson | | 270 | 173 | 97 |
| 1998-05-24 | vs CHN | 50 | W 2-1 | 36-14 | 1 | 48,580 | Tom Glavine | Steve Trachsel | Tom Glavine | Terry Adams | | 272 | 174 | 98 |
| 1998-05-25 | vs CHN | 51 | W 9-5 | 37-14 | 1 | 33,704 | Kevin Millwood | Kevin Tapani | Kevin Millwood | Kevin Tapani | | 281 | 179 | 102 |
| 1998-05-26 | vs MON | 52 | W 9-3 | 38-14 | 1 | 28,662 | Denny Neagle | Miguel Batista | Denny Neagle | Miguel Batista | | 290 | 182 | 108 |
| 1998-05-27 | vs MON | 53 | W 2-0 | 39-14 | 1 | 32,834 | Greg Maddux | Javier Vazquez | Greg Maddux | Javier Vazquez | Kerry Ligtenberg | 292 | 182 | 110 |
| 1998-05-28 | vs MON | 54 | L 5-9 | 39-15 | 1 | 31,416 | Dennis Martinez | Carl Pavano | Mike Maddux | Mark Wohlers | | 297 | 191 | 106 |
| 1998-05-29 | @ CHN | 55 | L 3-5 | 39-16 | 1 | 38,010 | Tom Glavine | Kerry Wood | Terry Adams | John Rocker | | 300 | 196 | 104 |
| 1998-05-30 | @ CHN | 56 | L 8-9 | 39-17 | 1 | 39,817 | Kevin Millwood | Steve Trachsel | Steve Trachsel | Kevin Millwood | Bob Patterson | 308 | 205 | 103 |
| 1998-05-31 | @ CHN | 57 | L 2-4 | 39-18 | 1 | 29,285 | Denny Neagle | Kevin Tapani | Kevin Tapani | Denny Neagle | Rod Beck | 310 | 209 | 101 |
| 1998-06-01 | @ MIL | 58 | W 5-2 | 40-18 | 1 | 21,873 | Greg Maddux | Steve Woodard | Greg Maddux | Steve Woodard | | 315 | 211 | 104 |
| 1998-06-02 | @ MIL | 59 | W 9-0 | 41-18 | 1 | 39,017 | Dennis Martinez | Paul Wagner | Dennis Martinez | Paul Wagner | | 324 | 211 | 113 |
| 1998-06-03 | @ MIL | 60 | W 5-2 | 42-18 | 1 | 19,116 | Tom Glavine | Jeff Juden | Tom Glavine | Jeff Juden | Mark Wohlers | 329 | 213 | 116 |
| 1998-06-05 | @ BAL | 61 | L 2-3 | 42-19 | 1 | 48,039 | Denny Neagle | Scott Erickson | Scott Erickson | Denny Neagle | | 331 | 216 | 115 |
| 1998-06-06 | @ BAL | 62 | W 10-5 | 43-19 | 1 | 48,098 | Kevin Millwood | Mike Mussina | Kevin Millwood | Mike Mussina | | 341 | 221 | 120 |
| 1998-06-07 | @ BAL | 63 | W 9-0 | 44-19 | 1 | 48,090 | Greg Maddux | Doug Drabek | Greg Maddux | Doug Drabek | | 350 | 221 | 129 |
| 1998-06-08 | vs BOS | 64 | W 7-6 | 45-19 | 1 | 44,018 | Tom Glavine | Derek Lowe | Alan Embree | John Wasdin | | 357 | 227 | 130 |
| 1998-06-09 | vs BOS | 65 | L 3-9 | 45-20 | 1 | 43,121 | Dennis Martinez | Bret Saberhagen | Bret Saberhagen | Dennis Martinez | | 360 | 236 | 124 |
| 1998-06-10 | vs BOS | 66 | L 6-10 | 45-21 | 1 | 41,345 | Denny Neagle | Pedro Martinez | Pedro Martinez | Denny Neagle | | 366 | 246 | 120 |
| 1998-06-12 | vs MON | 67 | L 5-7 | 45-22 | 1 | 45,942 | Greg Maddux | Javier Vazquez | Miguel Batista | Mike Cather | Ugueth Urbina | 371 | 253 | 118 |
| 1998-06-13 | vs MON | 68 | W 9-7 | 46-22 | 1 | 48,943 | Tom Glavine | Mike Johnson | Tom Glavine | Mike Johnson | Dennis Martinez | 380 | 260 | 120 |
| 1998-06-14 | vs MON | 69 | W 5-1 | 47-22 | 1 | 46,543 | Kevin Millwood | Carlos Perez | Kevin Millwood | Carlos Perez | | 385 | 261 | 124 |
| 1998-06-16 | vs FLO | 70 | W 7-0 | 48-22 | 1 | 39,331 | Denny Neagle | Joe Fontenot | Denny Neagle | Joe Fontenot | | 392 | 261 | 131 |
| 1998-06-17 | vs FLO | 71 | W 6-2 | 49-22 | 1 | 38,021 | Greg Maddux | Jesus Sanchez | Greg Maddux | Jesus Sanchez | | 398 | 263 | 135 |
| 1998-06-18 | vs FLO | 72 | L 2-3 | 49-23 | 1 | 46,296 | Tom Glavine | Ryan Dempster | Kirt Ojala | Tom Glavine | Antonio Alfonseca | 400 | 266 | 134 |
| 1998-06-19 | @ MON | 73 | L 1-14 | 49-24 | 1 | 10,364 | Kevin Millwood | Shawn Boskie | Shawn Boskie | Kevin Millwood | | 401 | 280 | 121 |
| 1998-06-20 | @ MON | 74 | W 5-1 | 50-24 | 1 | 11,139 | John Smoltz | Carlos Perez | John Smoltz | Carlos Perez | | 406 | 281 | 125 |
| 1998-06-21 | @ MON | 75 | L 1-4 | 50-25 | 1 | 12,265 | Denny Neagle | Dustin Hermanson | Dustin Hermanson | Denny Neagle | Ugueth Urbina | 407 | 285 | 122 |
| 1998-06-22 | @ NYA | 76 | L 4-6 | 50-26 | 1 | 53,316 | Greg Maddux | Andy Pettitte | Jeff Nelson | Dennis Martinez | Mariano Rivera | 411 | 291 | 120 |
| 1998-06-23 | @ NYA | 77 | W 7-2 | 51-26 | 1 | 54,775 | Tom Glavine | Orlando Hernandez | Tom Glavine | Orlando Hernandez | | 418 | 293 | 125 |
| 1998-06-24 | vs NYA | 78 | L 6-10 | 51-27 | 1 | 48,980 | Kevin Millwood | David Cone | David Cone | Kevin Millwood | Mariano Rivera | 424 | 303 | 121 |
| 1998-06-25 | vs NYA | 79 | L 0-6 | 51-28 | 1 | 49,052 | Denny Neagle | David Wells | David Wells | Denny Neagle | | 424 | 309 | 115 |
| 1998-06-26 | vs TOR | 80 | L 4-6 | 51-29 | 1 | 47,081 | John Smoltz | Pat Hentgen | Pat Hentgen | John Smoltz | Randy Myers | 428 | 315 | 113 |
| 1998-06-27 | vs TOR | 81 | W 2-0 | 52-29 | 1 | 48,338 | Greg Maddux | Juan Guzman | Greg Maddux | Juan Guzman | | 430 | 315 | 115 |
| 1998-06-28 | vs TOR | 82 | W 10-3 | 53-29 | 1 | 44,185 | Tom Glavine | Chris Carpenter | Tom Glavine | Chris Carpenter | | 440 | 318 | 122 |
| 1998-06-30 | @ TBA | 83 | W 7-2 | 54-29 | 1 | 41,047 | Denny Neagle | Tony Saunders | Denny Neagle | Tony Saunders | | 447 | 320 | 127 |
| 1998-07-01 | @ TBA | 84 | W 6-5 | 55-29 | 1 | 41,100 | John Smoltz | Julio Santana | Russ Springer | Roberto Hernandez | Kerry Ligtenberg | 453 | 325 | 128 |
| 1998-07-02 | @ TBA | 85 | W 6-0 | 56-29 | 1 | 40,749 | Greg Maddux | Rolando Arrojo | Greg Maddux | Rolando Arrojo | | 459 | 325 | 134 |
| 1998-07-03 | vs NYN | 86 | W 3-2 | 57-29 | 1 | 48,757 | Tom Glavine | Brian Bohanon | Tom Glavine | Brian Bohanon | Kerry Ligtenberg | 462 | 327 | 135 |
| 1998-07-04 | vs NYN | 87 | W 4-1 | 58-29 | 1 | 47,900 | Kevin Millwood | Masato Yoshii | Kevin Millwood | Masato Yoshii | | 466 | 328 | 138 |
| 1998-07-05 | vs NYN | 88 | W 3-2 | 59-29 | 1 | 40,430 | Denny Neagle | Rick Reed | Rudy Seanez | John Franco | | 469 | 330 | 139 |
| 1998-07-09 | @ FLO | 89 | W 6-4 | 60-29 | 1 | 25,535 | John Smoltz | Livan Hernandez | John Smoltz | Livan Hernandez | Kerry Ligtenberg | 475 | 334 | 141 |
| 1998-07-10 | @ FLO | 90 | L 1-3 | 60-30 | 1 | 26,018 | Denny Neagle | Jesus Sanchez | Jesus Sanchez | Denny Neagle | Felix Heredia | 476 | 337 | 139 |
| 1998-07-11 | @ FLO | 91 | L 3-4 | 60-31 | 1 | 36,795 | Greg Maddux | Ryan Dempster | Matt Mantei | Greg Maddux | | 479 | 341 | 138 |
| 1998-07-12 | @ FLO | 92 | L 3-5 | 60-32 | 1 | 24,956 | Tom Glavine | Brian Meadows | Brian Meadows | Tom Glavine | Antonio Alfonseca | 482 | 346 | 136 |
| 1998-07-14 | @ NYN | 93 | W 4-2 | 61-32 | 1 | 38,000 | John Smoltz | Bobby Jones | John Smoltz | Bobby Jones | Kerry Ligtenberg | 486 | 348 | 138 |
| 1998-07-15 | @ NYN | 94 | W 12-1 | 62-32 | 1 | 41,347 | Denny Neagle | Masato Yoshii | Denny Neagle | Masato Yoshii | | 498 | 349 | 149 |
| 1998-07-16 | vs MIL | 95 | W 4-3 | 63-32 | 1 | 46,098 | Greg Maddux | Cal Eldred | Greg Maddux | Cal Eldred | Rudy Seanez | 502 | 352 | 150 |
| 1998-07-17 | vs MIL | 96 | W 4-1 | 64-32 | 1 | 48,544 | Tom Glavine | Brad Woodall | Tom Glavine | Brad Woodall | John Rocker | 506 | 353 | 153 |
| 1998-07-18 | vs MIL | 97 | L 1-7 | 64-33 | 1 | 50,284 | Kevin Millwood | Steve Woodard | Steve Woodard | Kevin Millwood | | 507 | 360 | 147 |
| 1998-07-19 | vs MIL | 98 | W 11-6 | 65-33 | 1 | 44,598 | John Smoltz | Jeff Juden | John Smoltz | Jeff Juden | | 518 | 366 | 152 |
| 1998-07-20 | vs CHN | 99 | L 4-11 | 65-34 | 1 | 47,475 | Denny Neagle | Kevin Tapani | Kevin Tapani | Denny Neagle | | 522 | 377 | 145 |
| 1998-07-21 | vs CHN | 100 | L 0-3 | 65-35 | 1 | 47,933 | Greg Maddux | Kerry Wood | Kerry Wood | Greg Maddux | Rod Beck | 522 | 380 | 142 |
| 1998-07-22 | @ PHI | 101 | W 14-2 | 66-35 | 1 | 28,304 | Tom Glavine | Carlton Loewer | Tom Glavine | Carlton Loewer | | 536 | 382 | 154 |
| 1998-07-23 | @ PHI | 102 | W 3-2 | 67-35 | 1 | 28,222 | Kevin Millwood | Tyler Green | Kevin Millwood | Tyler Green | Kerry Ligtenberg | 539 | 384 | 155 |
| 1998-07-24 | @ PIT | 103 | W 3-0 | 68-35 | 1 | 24,776 | John Smoltz | Chris Peters | John Smoltz | Chris Peters | | 542 | 384 | 158 |
| 1998-07-25 | @ PIT | 104 | L 1-4 | 68-36 | 1 | 41,568 | Denny Neagle | Francisco Cordova | Francisco Cordova | Denny Neagle | Jason Christiansen | 543 | 388 | 155 |
| 1998-07-26 | @ PIT | 105 | W 2-1 | 69-36 | 1 | 34,925 | Greg Maddux | Jason Schmidt | Greg Maddux | Jason Schmidt | Kerry Ligtenberg | 545 | 389 | 156 |
| 1998-07-27 | @ CIN | 106 | W 3-2 | 70-36 | 1 | 23,866 | Tom Glavine | Mike Remlinger | Rudy Seanez | Stan Belinda | Kerry Ligtenberg | 548 | 391 | 157 |
| 1998-07-28 | @ CIN | 107 | L 1-13 | 70-37 | 1 | 22,690 | Kevin Millwood | Pete Harnisch | Scott Sullivan | Kevin Millwood | | 549 | 404 | 145 |
| 1998-07-29 | @ CIN | 108 | W 11-5 | 71-37 | 1 | 24,480 | John Smoltz | Steve Parris | Rudy Seanez | Steve Parris | | 560 | 409 | 151 |
| 1998-07-30 | @ CIN | 109 | W 13-3 | 72-37 | 1 | 28,946 | Denny Neagle | Rick Krivda | Denny Neagle | Rick Krivda | | 573 | 412 | 161 |
| 1998-07-31 | vs SLN | 110 | L 2-3 | 72-38 | 1 | 50,662 | Greg Maddux | Kent Mercker | Kent Mercker | Greg Maddux | Lance Painter | 575 | 415 | 160 |
| 1998-08-01 | vs SLN | 111 | W 3-1 | 73-38 | 1 | 50,137 | Tom Glavine | Kent Bottenfield | Rudy Seanez | Rich Croushore | Kerry Ligtenberg | 578 | 416 | 162 |
| 1998-08-02 | vs SLN | 112 | W 4-3 | 74-38 | 1 | 49,296 | Kevin Millwood | Bobby Witt | Kevin Millwood | Bobby Witt | Kerry Ligtenberg | 582 | 419 | 163 |
| 1998-08-04 | vs CIN | 113 | W 4-2 | 75-38 | 1 | 43,012 | John Smoltz | Steve Parris | John Smoltz | Scott Sullivan | Kerry Ligtenberg | 586 | 421 | 165 |
| 1998-08-05 | vs CIN | 114 | L 9-13 | 75-39 | 1 | 43,315 | Denny Neagle | Brett Tomko | John Hudek | Russ Springer | | 595 | 434 | 161 |
| 1998-08-06 | vs CIN | 115 | W 5-0 | 76-39 | 1 | 47,311 | Greg Maddux | Mike Remlinger | Greg Maddux | Mike Remlinger | | 600 | 434 | 166 |
| 1998-08-07 | @ SFN | 116 | W 5-0 | 77-39 | 1 | 29,676 | Tom Glavine | Kirk Rueter | Tom Glavine | Kirk Rueter | | 605 | 434 | 171 |
| 1998-08-08 | @ SFN | 117 | W 14-6 | 78-39 | 1 | 39,174 | Kevin Millwood | Danny Darwin | Kevin Millwood | Danny Darwin | | 619 | 440 | 179 |
| 1998-08-09 | @ SFN | 118 | W 7-5 | 79-39 | 1 | 43,957 | John Smoltz | Mark Gardner | Dennis Martinez | Jose Mesa | Kerry Ligtenberg | 626 | 445 | 181 |
| 1998-08-11 | @ SDN | 119 | L 1-3 | 79-40 | 1 | 31,430 | Denny Neagle | Joey Hamilton | Joey Hamilton | Denny Neagle | Trevor Hoffman | 627 | 448 | 179 |
| 1998-08-12 | @ SDN | 120 | L 1-5 | 79-41 | 1 | 40,597 | Greg Maddux | Andy Ashby | Andy Ashby | Greg Maddux | | 628 | 453 | 175 |
| 1998-08-13 | @ SDN | 121 | W 5-0 | 80-41 | 1 | 34,547 | Tom Glavine | Mark Langston | Tom Glavine | Mark Langston | | 633 | 453 | 180 |
| 1998-08-14 | @ LAN | 122 | W 5-2 | 81-41 | 1 | 43,560 | Kevin Millwood | Dave Mlicki | Kevin Millwood | Dave Mlicki | Kerry Ligtenberg | 638 | 455 | 183 |
| 1998-08-15 | @ LAN | 123 | W 5-3 | 82-41 | 1 | 41,240 | John Smoltz | Chan Ho Park | John Smoltz | Chan Ho Park | Kerry Ligtenberg | 643 | 458 | 185 |
| 1998-08-16 | @ LAN | 124 | L 0-1 | 82-42 | 1 | 44,471 | Denny Neagle | Darren Dreifort | Scott Radinsky | Denny Neagle | Jeff Shaw | 643 | 459 | 184 |
| 1998-08-18 | vs SFN | 125 | W 8-4 | 83-42 | 1 | 42,986 | Greg Maddux | Kirk Rueter | Greg Maddux | Kirk Rueter | | 651 | 463 | 188 |
| 1998-08-19 | vs SFN | 126 | L 2-6 | 83-43 | 1 | 44,535 | Tom Glavine | Mark Gardner | Mark Gardner | Tom Glavine | | 653 | 469 | 184 |
| 1998-08-20 | vs SDN | 127 | L 0-2 | 83-44 | 1 | 43,730 | Kevin Millwood | Kevin Brown | Kevin Brown | Kevin Millwood | Trevor Hoffman | 653 | 471 | 182 |
| 1998-08-21 | vs SDN | 128 | W 5-4 | 84-44 | 1 | 48,268 | John Smoltz | Joey Hamilton | John Smoltz | Joey Hamilton | Kerry Ligtenberg | 658 | 475 | 183 |
| 1998-08-22 | vs LAN | 129 | W 7-5 | 85-44 | 1 | 48,326 | Denny Neagle | Darren Dreifort | Denny Neagle | Darren Dreifort | Kerry Ligtenberg | 665 | 480 | 185 |
| 1998-08-23 | vs LAN | 130 | W 12-7 | 86-44 | 1 | 45,179 | Greg Maddux | Carlos Perez | Greg Maddux | Carlos Perez | | 677 | 487 | 190 |
| 1998-08-24 | vs LAN | 131 | W 4-3 | 87-44 | 1 | 39,449 | Tom Glavine | Brian Bohanon | Tom Glavine | Jeff Shaw | Kerry Ligtenberg | 681 | 490 | 191 |
| 1998-08-25 | @ HOU | 132 | L 2-3 | 87-45 | 1 | 32,157 | Kevin Millwood | Mike Hampton | Mike Hampton | Kevin Millwood | Billy Wagner | 683 | 493 | 190 |
| 1998-08-26 | @ HOU | 133 | W 6-2 | 88-45 | 1 | 32,651 | John Smoltz | Sean Bergman | John Smoltz | Sean Bergman | | 689 | 495 | 194 |
| 1998-08-27 | @ SLN | 134 | W 6-4 | 89-45 | 1 | 33,889 | Denny Neagle | Matt Morris | Denny Neagle | Matt Morris | Kerry Ligtenberg | 695 | 499 | 196 |
| 1998-08-28 | @ SLN | 135 | L 4-5 | 89-46 | 1 | 45,666 | Greg Maddux | Kent Mercker | Juan Acevedo | Dennis Martinez | | 699 | 504 | 195 |
| 1998-08-29 | @ SLN | 136 | W 4-3 | 90-46 | 1 | 47,627 | Tom Glavine | Kent Bottenfield | Tom Glavine | Kent Bottenfield | Rudy Seanez | 703 | 507 | 196 |
| 1998-08-30 | @ SLN | 137 | L 7-8 | 90-47 | 1 | 44,051 | Kevin Millwood | Donovan Osborne | Mark Petkovsek | Dennis Martinez | Juan Acevedo | 710 | 515 | 195 |
| 1998-08-31 | vs HOU | 138 | L 3-4 | 90-48 | 1 | 33,883 | John Smoltz | Mike Hampton | Jay Powell | John Smoltz | Billy Wagner | 713 | 519 | 194 |
| 1998-09-01 | vs HOU | 139 | W 6-4 | 91-48 | 1 | 31,168 | Denny Neagle | Sean Bergman | Denny Neagle | Scott Elarton | Kerry Ligtenberg | 719 | 523 | 196 |
| 1998-09-02 | vs HOU | 140 | L 2-4 | 91-49 | 1 | 46,238 | Greg Maddux | Randy Johnson | Randy Johnson | Greg Maddux | Billy Wagner | 721 | 527 | 194 |
| 1998-09-04 | @ NYN | 141 | L 1-2 | 91-50 | 1 | 34,617 | Tom Glavine | Al Leiter | Al Leiter | Tom Glavine | | 722 | 529 | 193 |
| 1998-09-05 | @ NYN | 142 | L 4-5 | 91-51 | 1 | 43,573 | Kevin Millwood | Bobby Jones | Turk Wendell | Rudy Seanez | John Franco | 726 | 534 | 192 |
| 1998-09-06 | @ NYN | 143 | W 4-0 | 92-51 | 1 | 40,311 | John Smoltz | Rick Reed | John Smoltz | Rick Reed | | 730 | 534 | 196 |
| 1998-09-07 | @ NYN | 144 | L 7-8 | 92-52 | 1 | 22,953 | Bruce Chen | Masato Yoshii | Greg McMichael | John Rocker | John Franco | 737 | 542 | 195 |
| 1998-09-08 | @ MON | 145 | L 3-6 | 92-53 | 1 | 7,216 | Greg Maddux | Miguel Batista | Miguel Batista | Greg Maddux | Ugueth Urbina | 740 | 548 | 192 |
| 1998-09-09 | @ MON | 146 | L 2-3 | 92-54 | 1 | 7,842 | Tom Glavine | Dustin Hermanson | Ugueth Urbina | John Rocker | | 742 | 551 | 191 |
| 1998-09-10 | @ MON | 147 | W 7-4 | 93-54 | 1 | 8,455 | Kevin Millwood | Mike Thurman | Kevin Millwood | Mike Thurman | Kerry Ligtenberg | 749 | 555 | 194 |
| 1998-09-11 | vs FLO | 148 | W 8-2 | 94-54 | 1 | 47,235 | John Smoltz | Kirt Ojala | John Smoltz | Kirt Ojala | | 757 | 557 | 200 |
| 1998-09-12 | vs FLO | 149 | W 4-2 | 95-54 | 1 | 48,797 | Bruce Chen | Livan Hernandez | Bruce Chen | Livan Hernandez | Kerry Ligtenberg | 761 | 559 | 202 |
| 1998-09-13 | vs FLO | 150 | L 5-6 | 95-55 | 1 | 45,683 | Greg Maddux | Jesus Sanchez | Jesus Sanchez | Odalis Perez | Matt Mantei | 766 | 565 | 201 |
| 1998-09-14 | vs PHI | 151 | W 4-2 | 96-55 | 1 | 33,367 | Tom Glavine | Curt Schilling | Tom Glavine | Curt Schilling | Kerry Ligtenberg | 770 | 567 | 203 |
| 1998-09-15 | vs PHI | 152 | W 3-0 | 97-55 | 1 | 35,478 | Kevin Millwood | Tyler Green | Kevin Millwood | Tyler Green | Norm Charlton | 773 | 567 | 206 |
| 1998-09-16 | vs PHI | 153 | W 5-1 | 98-55 | 1 | 34,961 | John Smoltz | Carlton Loewer | John Smoltz | Carlton Loewer | | 778 | 568 | 210 |
| 1998-09-17 | @ ARI | 154 | W 1-0 | 99-55 | 1 | 43,251 | Denny Neagle | Omar Daal | Denny Neagle | Omar Daal | Kerry Ligtenberg | 779 | 568 | 211 |
| 1998-09-18 | @ ARI | 155 | L 0-5 | 99-56 | 1 | 46,434 | Greg Maddux | Andy Benes | Andy Benes | Greg Maddux | | 779 | 573 | 206 |
| 1998-09-19 | @ ARI | 156 | W 5-0 | 100-56 | 1 | 48,405 | Tom Glavine | Brian Anderson | Tom Glavine | Brian Anderson | | 784 | 573 | 211 |
| 1998-09-20 | @ ARI | 157 | W 10-0 | 101-56 | 1 | 44,876 | Bruce Chen | Amaury Telemaco | Bruce Chen | Amaury Telemaco | | 794 | 573 | 221 |
| 1998-09-22 | @ FLO | 158 | W 4-1 | 102-56 | 1 | 23,355 | Kevin Millwood | Rafael Medina | Kevin Millwood | Rafael Medina | Kerry Ligtenberg | 798 | 574 | 224 |
| 1998-09-23 | @ FLO | 159 | W 11-0 | 103-56 | 1 | 22,469 | John Smoltz | Kirt Ojala | John Smoltz | Kirt Ojala | | 809 | 574 | 235 |
| 1998-09-25 | vs NYN | 160 | W 6-5 | 104-56 | 1 | 48,443 | Bruce Chen | Rick Reed | Dennis Martinez | Rick Reed | John Rocker | 815 | 579 | 236 |
| 1998-09-26 | vs NYN | 161 | W 4-0 | 105-56 | 1 | 48,117 | Tom Glavine | Al Leiter | Denny Neagle | Al Leiter | | 819 | 579 | 240 |
| 1998-09-27 | vs NYN | 162 | W 7-2 | 106-56 | 1 | 48,685 | Greg Maddux | Armando Reynoso | Greg Maddux | Armando Reynoso | | 826 | 581 | 245 |