| 1971-04-05 | @ CIN | 1 | W 7-4 | 1-0 | 1 | 51,702 | Phil Niekro | Gary Nolan | Cecil Upshaw | Wayne Granger | | 7 | 4 | 3 |
| 1971-04-07 | @ CIN | 2 | W 2-1 | 2-0 | 1 | 10,452 | Ron Reed | Jim McGlothlin | Ron Reed | Jim McGlothlin | Cecil Upshaw | 9 | 5 | 4 |
| 1971-04-09 | vs PIT | 3 | L 2-8 | 2-1 | 1 | 32,734 | Pat Jarvis | Bob Moose | Bob Moose | Pat Jarvis | Dave Giusti | 11 | 13 | -2 |
| 1971-04-10 | vs PIT | 4 | W 5-4 | 3-1 | 1 | 13,079 | Phil Niekro | Steve Blass | Cecil Upshaw | Nelson Briles | | 16 | 17 | -1 |
| 1971-04-11 | vs PIT | 5 | W 3-1 | 4-1 | 1 | 10,220 | Jim Nash | Dock Ellis | Jim Nash | Dock Ellis | | 19 | 18 | 1 |
| 1971-04-12 | vs CIN | 6 | L 3-7 | 4-2 | 2 | 15,178 | Ron Reed | Jim McGlothlin | Jim McGlothlin | Ron Reed | Clay Carroll | 22 | 25 | -3 |
| 1971-04-13 | vs CIN | 7 | L 4-5 | 4-3 | 3 | 8,870 | Pat Jarvis | Don Gullett | Don Gullett | Pat Jarvis | Joe Gibbon | 26 | 30 | -4 |
| 1971-04-14 | vs CIN | 8 | L 3-8 | 4-4 | 3 | 9,266 | Phil Niekro | Tony Cloninger | Tony Cloninger | Phil Niekro | Clay Carroll | 29 | 38 | -9 |
| 1971-04-16 | @ PHI | 9 | W 8-7 | 5-4 | 2 | 15,099 | Jim Nash | Jim Bunning | Cecil Upshaw | Jim Bunning | | 37 | 45 | -8 |
| 1971-04-17 | @ PHI | 10 | W 6-2 | 6-4 | 2 | 10,686 | Ron Reed | Barry Lersch | Ron Reed | Barry Lersch | | 43 | 47 | -4 |
| 1971-04-18 | @ PHI | 11 | W 5-4 | 7-4 | 2 | 29,583 | Pat Jarvis | Rick Wise | Cecil Upshaw | Woodie Fryman | | 48 | 51 | -3 |
| 1971-04-20 | @ PIT | 12 | W 2-0 | 8-4 | 2 | 8,755 | Phil Niekro | Bob Moose | Phil Niekro | Bob Moose | | 50 | 51 | -1 |
| 1971-04-21 | @ PIT | 13 | L 2-10 | 8-5 | 2 | 7,992 | Jim Nash | Dock Ellis | Dock Ellis | Jim Nash | | 52 | 61 | -9 |
| 1971-04-22 | @ PIT | 14 | L 4-7 | 8-6 | 2 | 4,708 | Ron Reed | Steve Blass | Steve Blass | Ron Reed | Dave Giusti | 56 | 68 | -12 |
| 1971-04-24 | vs SDN | 15 | L 2-3 | 8-7 | 3 | 8,115 | Pat Jarvis | Tom Phoebus | Tom Phoebus | Cecil Upshaw | Al Severinsen | 58 | 71 | -13 |
| 1971-04-25 | vs SDN | 16 | L 2-3 | 9-8 | 3 | 0 | Phil Niekro | Dave Roberts | Dave Roberts | Phil Niekro | Al Severinsen | 60 | 74 | -14 |
| 1971-04-25 | vs SDN | 17 | W 4-3 | 9-8 | 3 | 25,922 | George Stone | Clay Kirby | Cecil Upshaw | Gary Ross | | 64 | 77 | -13 |
| 1971-04-27 | vs SFN | 18 | L 5-6 | 9-9 | 3 | 13,494 | Ron Reed | Gaylord Perry | John Cumberland | Bob Priddy | Jerry Johnson | 69 | 83 | -14 |
| 1971-04-28 | vs SFN | 19 | L 3-5 | 9-10 | 4 | 7,250 | Jim Nash | Steve Stone | Steve Stone | Jim Nash | Don McMahon | 72 | 88 | -16 |
| 1971-04-29 | vs SFN | 20 | L 2-5 | 9-11 | 4 | 6,194 | Pat Jarvis | Ron Bryant | Don McMahon | Cecil Upshaw | John Cumberland | 74 | 93 | -19 |
| 1971-04-30 | vs LAN | 21 | W 7-2 | 10-11 | 4 | 7,759 | Phil Niekro | Bill Singer | Phil Niekro | Bill Singer | | 81 | 95 | -14 |
| 1971-05-01 | vs LAN | 22 | W 7-5 | 11-11 | 3 | 16,726 | George Stone | Claude Osteen | Mike McQueen | Sandy Vance | | 88 | 100 | -12 |
| 1971-05-02 | vs LAN | 23 | W 4-1 | 12-11 | 2 | 34,906 | Ron Reed | Don Sutton | Ron Reed | Don Sutton | | 92 | 101 | -9 |
| 1971-05-04 | @ SDN | 24 | L 2-3 | 12-12 | 3 | 2,924 | Pat Jarvis | Tom Phoebus | Al Severinsen | Pat Jarvis | | 94 | 104 | -10 |
| 1971-05-05 | @ SDN | 25 | L 1-5 | 13-13 | 2 | 0 | Phil Niekro | Dave Roberts | Dave Roberts | Phil Niekro | Al Severinsen | 95 | 109 | -14 |
| 1971-05-05 | @ SDN | 26 | W 3-1 | 13-13 | 2 | 4,973 | Jim Nash | Clay Kirby | Jim Nash | Clay Kirby | Cecil Upshaw | 98 | 110 | -12 |
| 1971-05-07 | @ SFN | 27 | L 3-4 | 13-14 | 4 | 11,097 | George Stone | Gaylord Perry | Jerry Johnson | George Stone | | 101 | 114 | -13 |
| 1971-05-08 | @ SFN | 28 | W 5-2 | 14-14 | 2 | 10,751 | Ron Reed | Ron Bryant | Ron Reed | Ron Bryant | Cecil Upshaw | 106 | 116 | -10 |
| 1971-05-09 | @ SFN | 29 | L 2-5 | 15-15 | 2 | 0 | Pat Jarvis | Steve Stone | Steve Stone | Pat Jarvis | Don McMahon | 108 | 121 | -13 |
| 1971-05-09 | @ SFN | 30 | W 6-5 | 15-15 | 2 | 28,744 | Phil Niekro | Rich Robertson | Bob Priddy | Jerry Johnson | Cecil Upshaw | 114 | 126 | -12 |
| 1971-05-11 | @ LAN | 31 | L 1-6 | 15-16 | 3 | 32,959 | Jim Nash | Claude Osteen | Claude Osteen | Jim Nash | | 115 | 132 | -17 |
| 1971-05-12 | @ LAN | 32 | L 0-5 | 15-17 | 3 | 15,702 | George Stone | Don Sutton | Don Sutton | George Stone | | 115 | 137 | -22 |
| 1971-05-14 | vs PHI | 33 | W 3-2 | 16-17 | 3 | 10,164 | Ron Reed | Barry Lersch | Ron Reed | Barry Lersch | Cecil Upshaw | 118 | 139 | -21 |
| 1971-05-15 | vs PHI | 34 | W 6-2 | 17-17 | 2 | 4,976 | Phil Niekro | Chris Short | Phil Niekro | Chris Short | | 124 | 141 | -17 |
| 1971-05-16 | vs PHI | 35 | L 3-4 | 17-18 | 3 | 16,990 | Pat Jarvis | Rick Wise | Rick Wise | Pat Jarvis | Woodie Fryman | 127 | 145 | -18 |
| 1971-05-17 | vs NYN | 36 | W 4-3 | 18-18 | 2 | 16,051 | George Stone | Tom Seaver | Bob Priddy | Ron Taylor | | 131 | 148 | -17 |
| 1971-05-18 | vs NYN | 37 | W 8-6 | 19-18 | 2 | 9,264 | Mike McQueen | Jim McAndrew | Mike McQueen | Jim McAndrew | Bob Priddy | 139 | 154 | -15 |
| 1971-05-19 | vs MON | 38 | W 10-4 | 20-18 | 2 | 4,686 | Jim Nash | Ernie McAnally | Jim Nash | Ernie McAnally | Steve Barber | 149 | 158 | -9 |
| 1971-05-20 | vs MON | 39 | L 3-4 | 20-19 | 2 | 5,497 | Phil Niekro | Steve Renko | Mike Marshall | Ron Herbel | | 152 | 162 | -10 |
| 1971-05-21 | @ NYN | 40 | L 2-6 | 20-20 | 2 | 36,843 | Pat Jarvis | Nolan Ryan | Nolan Ryan | Pat Jarvis | Danny Frisella | 154 | 168 | -14 |
| 1971-05-22 | @ NYN | 41 | L 7-8 | 20-21 | 2 | 43,649 | George Stone | Tom Seaver | Ron Taylor | Cecil Upshaw | | 161 | 176 | -15 |
| 1971-05-23 | @ NYN | 42 | L 0-4 | 20-22 | 3 | 50,999 | Mike McQueen | Ray Sadecki | Ray Sadecki | Mike McQueen | | 161 | 180 | -19 |
| 1971-05-24 | @ MON | 43 | W 9-4 | 21-22 | 2 | 23,018 | Jim Nash | Steve Renko | Jim Nash | Steve Renko | Bob Priddy | 170 | 184 | -14 |
| 1971-05-25 | @ MON | 44 | L 2-3 | 21-23 | 3 | 8,426 | Phil Niekro | Carl Morton | Carl Morton | Phil Niekro | | 172 | 187 | -15 |
| 1971-05-26 | @ MON | 45 | L 1-11 | 21-24 | 3 | 6,263 | Pat Jarvis | Bill Stoneman | Bill Stoneman | Pat Jarvis | | 173 | 198 | -25 |
| 1971-05-27 | @ MON | 46 | W 4-1 | 22-24 | 3 | 13,156 | Tom Kelley | Ernie McAnally | Tom Kelley | Ernie McAnally | | 177 | 199 | -22 |
| 1971-05-28 | @ SLN | 47 | L 0-4 | 22-25 | 4 | 14,537 | Ron Reed | Reggie Cleveland | Reggie Cleveland | Ron Reed | | 177 | 203 | -26 |
| 1971-05-29 | @ SLN | 48 | L 7-8 | 22-26 | 4 | 47,598 | Jim Nash | Bob Gibson | Moe Drabowsky | Cecil Upshaw | | 184 | 211 | -27 |
| 1971-05-30 | @ SLN | 49 | L 3-8 | 22-27 | 4 | 24,380 | Phil Niekro | Steve Carlton | Steve Carlton | Phil Niekro | | 187 | 219 | -32 |
| 1971-05-31 | @ SLN | 50 | L 2-3 | 22-28 | 4 | 20,349 | George Stone | Jerry Reuss | Jerry Reuss | George Stone | | 189 | 222 | -33 |
| 1971-06-01 | vs HOU | 51 | L 6-7 | 22-28 | 4 | 6,754 | Tom Kelley | Wade Blasingame | Wade Blasingame | Tom Kelley | Fred Gladding | 195 | 229 | -34 |
| 1971-06-02 | vs HOU | 52 | W 3-1 | 22-28 | 4 | 4,586 | Ron Reed | Don Wilson | Ron Reed | Don Wilson | Cecil Upshaw | 198 | 230 | -32 |
| 1971-06-03 | vs HOU | 53 | W 5-2 | 22-28 | 4 | 5,425 | Jim Nash | Ken Forsch | Pat Jarvis | Ken Forsch | Bob Priddy | 203 | 232 | -29 |
| 1971-06-04 | vs CHN | 54 | L 0-11 | 22-29 | 4 | 10,761 | Phil Niekro | Fergie Jenkins | Fergie Jenkins | Phil Niekro | | 203 | 243 | -40 |
| 1971-06-05 | vs CHN | 55 | W 6-4 | 23-29 | 4 | 14,024 | George Stone | Bill Bonham | Cecil Upshaw | Phil Regan | | 209 | 247 | -38 |
| 1971-06-06 | vs CHN | 56 | L 3-6 | 23-30 | 4 | 21,533 | Jim Nash | Bill Hands | Bill Hands | Jim Nash | | 212 | 253 | -41 |
| 1971-06-07 | vs SLN | 57 | L 6-7 | 23-31 | 4 | 10,354 | Ron Reed | Mike Torrez | Moe Drabowsky | Bob Priddy | | 218 | 260 | -42 |
| 1971-06-08 | vs SLN | 58 | W 8-7 | 24-31 | 4 | 8,518 | Pat Jarvis | Steve Carlton | Cecil Upshaw | Frank Linzy | | 226 | 267 | -41 |
| 1971-06-09 | vs SLN | 59 | W 8-3 | 25-31 | 4 | 7,506 | Phil Niekro | Chris Zachary | Phil Niekro | Chris Zachary | | 234 | 270 | -36 |
| 1971-06-10 | @ HOU | 60 | W 2-1 | 26-31 | 4 | 14,591 | Tom Kelley | Larry Dierker | Tom Kelley | Larry Dierker | Cecil Upshaw | 236 | 271 | -35 |
| 1971-06-11 | @ HOU | 61 | L 4-5 | 26-32 | 4 | 14,885 | Jim Nash | Wade Blasingame | Fred Gladding | Bob Priddy | | 240 | 276 | -36 |
| 1971-06-12 | @ HOU | 62 | L 2-3 | 26-33 | 4 | 23,876 | Ron Reed | Ken Forsch | Ken Forsch | Ron Reed | | 242 | 279 | -37 |
| 1971-06-13 | @ HOU | 63 | W 9-0 | 27-33 | 4 | 19,646 | Pat Jarvis | Don Wilson | Pat Jarvis | Don Wilson | | 251 | 279 | -28 |
| 1971-06-14 | @ CHN | 64 | L 2-3 | 27-34 | 4 | 14,381 | Phil Niekro | Phil Regan | Phil Regan | Phil Niekro | Ron Tompkins | 253 | 282 | -29 |
| 1971-06-15 | @ CHN | 65 | L 1-3 | 27-35 | 4 | 18,758 | Tom Kelley | Bill Hands | Bill Hands | Tom Kelley | | 254 | 285 | -31 |
| 1971-06-16 | @ CHN | 66 | W 6-5 | 28-35 | 4 | 19,204 | Jim Nash | Ken Holtzman | Jim Nash | Ken Holtzman | Phil Niekro | 260 | 290 | -30 |
| 1971-06-17 | @ CIN | 67 | L 1-5 | 28-36 | 4 | 19,068 | Ron Reed | Jim McGlothlin | Jim McGlothlin | Ron Reed | | 261 | 295 | -34 |
| 1971-06-18 | @ CIN | 68 | L 1-6 | 28-37 | 5 | 20,600 | Pat Jarvis | Gary Nolan | Gary Nolan | Pat Jarvis | | 262 | 301 | -39 |
| 1971-06-19 | @ CIN | 69 | W 9-3 | 29-37 | 4 | 34,009 | Phil Niekro | Ross Grimsley | Phil Niekro | Ross Grimsley | | 271 | 304 | -33 |
| 1971-06-20 | @ CIN | 70 | L 4-5 | 29-39 | 5 | 0 | George Stone | Wayne Simpson | Joe Gibbon | Bob Priddy | | 275 | 309 | -34 |
| 1971-06-20 | @ CIN | 71 | L 0-2 | 29-39 | 5 | 37,488 | Tom Kelley | Don Gullett | Don Gullett | Tom Kelley | Clay Carroll | 275 | 311 | -36 |
| 1971-06-21 | vs MON | 72 | W 6-4 | 30-40 | 5 | 0 | Jim Nash | John Strohmayer | Cecil Upshaw | Claude Raymond | | 281 | 315 | -34 |
| 1971-06-21 | vs MON | 73 | L 3-5 | 30-40 | 5 | 8,203 | Steve Barber | Dan McGinn | Howie Reed | Cecil Upshaw | Carl Morton | 284 | 320 | -36 |
| 1971-06-22 | vs MON | 74 | W 4-0 | 31-40 | 5 | 5,567 | Ron Reed | Steve Renko | Ron Reed | Steve Renko | | 288 | 320 | -32 |
| 1971-06-23 | vs MON | 75 | L 3-6 | 31-41 | 5 | 5,262 | Pat Jarvis | Carl Morton | Carl Morton | Pat Jarvis | John Strohmayer | 291 | 326 | -35 |
| 1971-06-25 | vs CIN | 76 | W 8-6 | 33-41 | 4 | 0 | Tom Kelley | Wayne Simpson | Bob Priddy | Jim Merritt | Cecil Upshaw | 299 | 332 | -33 |
| 1971-06-25 | vs CIN | 77 | W 10-3 | 33-41 | 4 | 25,903 | Phil Niekro | Tony Cloninger | Phil Niekro | Tony Cloninger | | 309 | 335 | -26 |
| 1971-06-26 | vs CIN | 78 | W 1-0 | 34-41 | 4 | 20,436 | George Stone | Jim McGlothlin | George Stone | Jim McGlothlin | | 310 | 335 | -25 |
| 1971-06-27 | vs CIN | 79 | L 5-7 | 34-42 | 4 | 15,937 | Ron Reed | Gary Nolan | Gary Nolan | Ron Reed | Wayne Granger | 315 | 342 | -27 |
| 1971-06-28 | @ HOU | 80 | L 5-6 | 34-44 | 5 | 0 | Steve Barber | Don Wilson | Don Wilson | Steve Barber | | 320 | 348 | -28 |
| 1971-06-28 | @ HOU | 81 | L 4-6 | 34-44 | 5 | 18,908 | Jim Nash | Wade Blasingame | Jim Ray | Jim Nash | George Culver | 324 | 354 | -30 |
| 1971-06-29 | @ HOU | 82 | W 5-4 | 35-44 | 5 | 14,855 | Phil Niekro | Jack Billingham | Phil Niekro | Jack Billingham | Cecil Upshaw | 329 | 358 | -29 |
| 1971-06-30 | @ MON | 83 | W 6-5 | 36-44 | 4 | 13,906 | Tom Kelley | Steve Renko | Tom Kelley | Steve Renko | Ron Herbel | 335 | 363 | -28 |
| 1971-07-01 | @ MON | 84 | W 7-3 | 37-44 | 4 | 11,176 | George Stone | John Strohmayer | Phil Niekro | Mike Marshall | Cecil Upshaw | 342 | 366 | -24 |
| 1971-07-02 | @ NYN | 85 | W 3-2 | 38-44 | 4 | 37,146 | Ron Reed | Charlie Williams | Ron Reed | Danny Frisella | | 345 | 368 | -23 |
| 1971-07-03 | @ NYN | 86 | W 7-1 | 39-44 | 4 | 30,249 | Jim Nash | Gary Gentry | Jim Nash | Gary Gentry | | 352 | 369 | -17 |
| 1971-07-04 | @ NYN | 87 | W 2-0 | 40-44 | 4 | 27,451 | Phil Niekro | Tom Seaver | Phil Niekro | Tom Seaver | | 354 | 369 | -15 |
| 1971-07-05 | vs PHI | 88 | L 5-6 | 40-45 | 4 | 33,353 | Tom Kelley | Bill Champion | Woodie Fryman | Bob Priddy | Joe Hoerner | 359 | 375 | -16 |
| 1971-07-06 | vs PHI | 89 | W 5-2 | 41-45 | 4 | 7,950 | George Stone | Rick Wise | George Stone | Rick Wise | Cecil Upshaw | 364 | 377 | -13 |
| 1971-07-07 | vs PHI | 90 | W 4-2 | 42-45 | 4 | 12,268 | Ron Reed | Barry Lersch | Ron Reed | Barry Lersch | | 368 | 379 | -11 |
| 1971-07-09 | @ PIT | 91 | L 2-11 | 42-46 | 4 | 29,678 | Jim Nash | Nelson Briles | Nelson Briles | Jim Nash | | 370 | 390 | -20 |
| 1971-07-10 | @ PIT | 92 | L 4-5 | 42-47 | 4 | 18,955 | Phil Niekro | Steve Blass | Mudcat Grant | Phil Niekro | Dave Giusti | 374 | 395 | -21 |
| 1971-07-15 | vs LAN | 93 | L 0-6 | 42-48 | 4 | 11,431 | Ron Reed | Claude Osteen | Claude Osteen | Ron Reed | | 374 | 401 | -27 |
| 1971-07-16 | vs LAN | 94 | W 3-1 | 43-48 | 4 | 15,884 | Phil Niekro | Don Sutton | Phil Niekro | Don Sutton | | 377 | 402 | -25 |
| 1971-07-17 | vs LAN | 95 | W 10-0 | 44-48 | 4 | 21,698 | George Stone | Doyle Alexander | George Stone | Doyle Alexander | | 387 | 402 | -15 |
| 1971-07-18 | vs SFN | 96 | L 4-5 | 45-49 | 4 | 0 | Jim Nash | Don Carrithers | Jerry Johnson | Bob Priddy | | 391 | 407 | -16 |
| 1971-07-18 | vs SFN | 97 | W 4-2 | 45-49 | 4 | 46,489 | Tom Kelley | Steve Stone | Tom Kelley | Steve Stone | Pat Jarvis | 395 | 409 | -14 |
| 1971-07-19 | vs SFN | 98 | L 8-11 | 45-50 | 4 | 13,361 | Steve Barber | John Cumberland | Don McMahon | Bob Priddy | Steve Hamilton | 403 | 420 | -17 |
| 1971-07-20 | vs SDN | 99 | W 3-1 | 46-50 | 4 | 5,127 | Ron Reed | Dave Roberts | Ron Reed | Dave Roberts | | 406 | 421 | -15 |
| 1971-07-21 | vs SDN | 100 | W 8-7 | 48-50 | 4 | 0 | Phil Niekro | Steve Arlin | Cecil Upshaw | Al Severinsen | | 414 | 428 | -14 |
| 1971-07-21 | vs SDN | 101 | W 1-0 | 48-50 | 4 | 11,585 | Pat Jarvis | Fred Norman | Pat Jarvis | Fred Norman | | 415 | 428 | -13 |
| 1971-07-22 | vs SDN | 102 | W 1-0 | 49-50 | 4 | 7,533 | Tom Kelley | Tom Phoebus | Tom Kelley | Tom Phoebus | Bob Priddy | 416 | 428 | -12 |
| 1971-07-23 | @ LAN | 103 | W 5-3 | 50-50 | 4 | 21,705 | George Stone | Bill Singer | George Stone | Bill Singer | Cecil Upshaw | 421 | 431 | -10 |
| 1971-07-24 | @ LAN | 104 | L 1-2 | 50-51 | 4 | 45,260 | Ron Reed | Claude Osteen | Jim Brewer | Bob Priddy | | 422 | 433 | -11 |
| 1971-07-25 | @ LAN | 105 | W 3-1 | 51-51 | 3 | 20,271 | Phil Niekro | Don Sutton | Phil Niekro | Don Sutton | | 425 | 434 | -9 |
| 1971-07-27 | @ SFN | 106 | W 4-3 | 52-51 | 4 | 9,021 | Pat Jarvis | Juan Marichal | Pat Jarvis | Juan Marichal | Cecil Upshaw | 429 | 437 | -8 |
| 1971-07-28 | @ SFN | 107 | L 1-2 | 52-52 | 4 | 7,580 | George Stone | John Cumberland | John Cumberland | Jim Nash | Jerry Johnson | 430 | 439 | -9 |
| 1971-07-29 | @ SFN | 108 | W 4-2 | 53-52 | 4 | 7,829 | Ron Reed | Ron Bryant | Ron Reed | Ron Bryant | | 434 | 441 | -7 |
| 1971-07-30 | @ SDN | 109 | W 3-1 | 53-52 | 4 | 6,669 | Phil Niekro | Steve Arlin | Bob Priddy | Bob Miller | Cecil Upshaw | 437 | 442 | -5 |
| 1971-07-31 | @ SDN | 110 | W 3-2 | 53-52 | 4 | 6,228 | Tom Kelley | Fred Norman | Tom Kelley | Fred Norman | Jim Nash | 440 | 444 | -4 |
| 1971-08-01 | @ SDN | 111 | L 0-2 | 53-52 | 4 | 4,327 | Pat Jarvis | Clay Kirby | Clay Kirby | Pat Jarvis | | 440 | 446 | -6 |
| 1971-08-02 | @ PHI | 112 | L 0-4 | 53-53 | 4 | 12,104 | George Stone | Rick Wise | Rick Wise | George Stone | | 440 | 450 | -10 |
| 1971-08-03 | @ PHI | 113 | L 2-3 | 53-54 | 4 | 17,703 | Ron Reed | Chris Short | Chris Short | Bob Priddy | | 442 | 453 | -11 |
| 1971-08-04 | @ PHI | 114 | W 5-3 | 54-54 | 4 | 19,086 | Phil Niekro | Barry Lersch | Mike McQueen | Bucky Brandon | | 447 | 456 | -9 |
| 1971-08-05 | vs NYN | 115 | W 2-1 | 55-54 | 4 | 23,598 | Tom Kelley | Ray Sadecki | Steve Barber | Ron Taylor | | 449 | 457 | -8 |
| 1971-08-06 | vs NYN | 116 | L 1-9 | 55-55 | 4 | 21,008 | Pat Jarvis | Tom Seaver | Tom Seaver | Pat Jarvis | | 450 | 466 | -16 |
| 1971-08-07 | vs NYN | 117 | L 6-20 | 55-56 | 4 | 20,827 | Ron Reed | Nolan Ryan | Nolan Ryan | Ron Reed | Ron Taylor | 456 | 486 | -30 |
| 1971-08-08 | vs NYN | 118 | W 5-0 | 56-56 | 4 | 15,664 | Phil Niekro | Charlie Williams | Phil Niekro | Charlie Williams | | 461 | 486 | -25 |
| 1971-08-10 | @ SLN | 119 | W 2-1 | 57-56 | 4 | 20,921 | George Stone | Reggie Cleveland | George Stone | Reggie Cleveland | Cecil Upshaw | 463 | 487 | -24 |
| 1971-08-11 | @ SLN | 120 | W 9-3 | 58-56 | 4 | 21,906 | Tom Kelley | Chris Zachary | Tom Kelley | Chris Zachary | Mike McQueen | 472 | 490 | -18 |
| 1971-08-12 | vs HOU | 121 | W 10-5 | 59-56 | 3 | 10,430 | Ron Reed | Wade Blasingame | Ron Reed | Wade Blasingame | | 482 | 495 | -13 |
| 1971-08-13 | vs HOU | 122 | L 2-8 | 59-57 | 4 | 11,568 | Phil Niekro | Don Wilson | Don Wilson | Phil Niekro | | 484 | 503 | -19 |
| 1971-08-14 | vs HOU | 123 | W 7-0 | 60-57 | 3 | 25,188 | Pat Jarvis | Ron Cook | Pat Jarvis | Ron Cook | | 491 | 503 | -12 |
| 1971-08-15 | vs HOU | 124 | L 4-5 | 60-58 | 4 | 12,895 | George Stone | Ken Forsch | George Culver | Cecil Upshaw | | 495 | 508 | -13 |
| 1971-08-16 | vs CHN | 125 | L 0-3 | 60-59 | 4 | 12,282 | Tom Kelley | Fergie Jenkins | Fergie Jenkins | Tom Kelley | | 495 | 511 | -16 |
| 1971-08-17 | vs CHN | 126 | W 5-4 | 61-59 | 4 | 10,070 | Ron Reed | Bill Hands | Jim Nash | Ray Newman | | 500 | 515 | -15 |
| 1971-08-18 | vs CHN | 127 | L 2-7 | 61-60 | 4 | 13,432 | Phil Niekro | Milt Pappas | Milt Pappas | Phil Niekro | | 502 | 522 | -20 |
| 1971-08-20 | vs SLN | 128 | W 6-5 | 62-60 | 3 | 16,099 | Pat Jarvis | Reggie Cleveland | Steve Barber | Don Shaw | | 508 | 527 | -19 |
| 1971-08-21 | vs SLN | 129 | W 8-5 | 63-60 | 3 | 22,451 | George Stone | Steve Carlton | George Stone | Steve Carlton | | 516 | 532 | -16 |
| 1971-08-22 | vs SLN | 130 | L 4-13 | 63-61 | 3 | 19,650 | Ron Reed | Jerry Reuss | Jerry Reuss | Ron Reed | Chuck Taylor | 520 | 545 | -25 |
| 1971-08-23 | vs PIT | 131 | L 3-4 | 63-63 | 3 | 0 | Phil Niekro | Steve Blass | Steve Blass | Phil Niekro | Dave Giusti | 523 | 549 | -26 |
| 1971-08-23 | vs PIT | 132 | L 4-15 | 63-63 | 3 | 16,163 | Tom Kelley | Bob Moose | Bob Moose | Tom Kelley | Nelson Briles | 527 | 564 | -37 |
| 1971-08-24 | vs PIT | 133 | W 15-5 | 64-63 | 3 | 8,478 | Mike McQueen | Bob Johnson | Mike McQueen | Bob Johnson | Cecil Upshaw | 542 | 569 | -27 |
| 1971-08-25 | vs PIT | 134 | L 6-13 | 64-64 | 3 | 8,365 | Pat Jarvis | Bruce Kison | Bob Moose | Pat Jarvis | Bob Miller | 548 | 582 | -34 |
| 1971-08-27 | @ CHN | 135 | L 0-3 | 64-65 | 4 | 23,150 | Ron Reed | Milt Pappas | Milt Pappas | Ron Reed | | 548 | 585 | -37 |
| 1971-08-28 | @ CHN | 136 | W 4-3 | 65-65 | 3 | 34,988 | Phil Niekro | Fergie Jenkins | Phil Niekro | Fergie Jenkins | | 552 | 588 | -36 |
| 1971-08-29 | @ CHN | 137 | W 5-4 | 66-65 | 3 | 29,685 | Tom Kelley | Juan Pizarro | Steve Barber | Juan Pizarro | Jim Nash | 557 | 592 | -35 |
| 1971-08-31 | @ SFN | 138 | L 0-9 | 66-66 | 3 | 13,615 | George Stone | Gaylord Perry | Gaylord Perry | George Stone | | 557 | 601 | -44 |
| 1971-09-01 | @ SFN | 139 | L 0-4 | 66-67 | 3 | 10,760 | Ron Reed | John Cumberland | John Cumberland | Ron Reed | | 557 | 605 | -48 |
| 1971-09-03 | @ SDN | 140 | L 2-3 | 66-68 | 3 | 4,169 | Phil Niekro | Steve Arlin | Steve Arlin | Phil Niekro | | 559 | 608 | -49 |
| 1971-09-04 | @ SDN | 141 | W 11-7 | 67-68 | 3 | 4,498 | Pat Jarvis | Clay Kirby | Jim Nash | Clay Kirby | | 570 | 615 | -45 |
| 1971-09-05 | @ SDN | 142 | W 5-2 | 68-68 | 3 | 4,339 | Tom Kelley | Ed Acosta | Tom Kelley | Ed Acosta | Phil Niekro | 575 | 617 | -42 |
| 1971-09-06 | vs HOU | 143 | L 4-6 | 68-68 | 3 | 7,978 | George Stone | Scipio Spinks | Scipio Spinks | George Stone | | 579 | 623 | -44 |
| 1971-09-07 | vs HOU | 144 | L 1-5 | 68-69 | 3 | 5,753 | Ron Reed | Don Wilson | Don Wilson | Ron Reed | | 580 | 628 | -48 |
| 1971-09-10 | vs SFN | 145 | W 7-5 | 69-69 | 3 | 8,403 | Phil Niekro | Gaylord Perry | Jim Nash | Jerry Johnson | | 587 | 633 | -46 |
| 1971-09-11 | vs SFN | 146 | W 5-4 | 70-69 | 3 | 11,365 | Tom Kelley | Don Carrithers | Cecil Upshaw | Don McMahon | | 592 | 637 | -45 |
| 1971-09-12 | vs SFN | 147 | L 1-6 | 70-70 | 3 | 15,584 | George Stone | John Cumberland | John Cumberland | George Stone | | 593 | 643 | -50 |
| 1971-09-13 | @ CIN | 148 | L 1-2 | 70-71 | 4 | 7,144 | Gary Neibauer | Gary Nolan | Joe Gibbon | Pat Jarvis | | 594 | 645 | -51 |
| 1971-09-14 | @ CIN | 149 | W 5-2 | 71-71 | 3 | 8,385 | Ron Reed | Don Gullett | Ron Reed | Don Gullett | Cecil Upshaw | 599 | 647 | -48 |
| 1971-09-15 | @ HOU | 150 | W 4-2 | 72-71 | 3 | 6,513 | Phil Niekro | Jack Billingham | Phil Niekro | Jack Billingham | | 603 | 649 | -46 |
| 1971-09-16 | @ HOU | 151 | W 4-3 | 73-71 | 3 | 7,906 | Tom Kelley | J.R. Richard | Pat Jarvis | J.R. Richard | | 607 | 652 | -45 |
| 1971-09-17 | @ LAN | 152 | W 3-2 | 74-71 | 3 | 32,952 | George Stone | Claude Osteen | Cecil Upshaw | Hoyt Wilhelm | | 610 | 654 | -44 |
| 1971-09-18 | @ LAN | 153 | W 9-6 | 75-71 | 3 | 25,482 | Jim Nash | Bill Singer | Gary Neibauer | Joe Moeller | Steve Barber | 619 | 660 | -41 |
| 1971-09-19 | @ LAN | 154 | L 0-12 | 75-73 | 3 | 0 | Phil Niekro | Al Downing | Al Downing | Phil Niekro | | 619 | 672 | -53 |
| 1971-09-19 | @ LAN | 155 | L 0-4 | 75-73 | 3 | 46,735 | Ron Reed | Don Sutton | Don Sutton | Ron Reed | | 619 | 676 | -57 |
| 1971-09-21 | vs SDN | 156 | W 5-2 | 76-73 | 3 | 3,504 | Tom Kelley | Jay Franklin | Tom Kelley | Jay Franklin | | 624 | 678 | -54 |
| 1971-09-22 | vs SDN | 157 | L 3-7 | 76-74 | 3 | 4,474 | Pat Jarvis | Ed Acosta | Ed Acosta | Pat Jarvis | | 627 | 685 | -58 |
| 1971-09-24 | vs LAN | 158 | L 0-2 | 76-75 | 3 | 9,183 | Phil Niekro | Al Downing | Al Downing | Phil Niekro | | 627 | 687 | -60 |
| 1971-09-25 | vs LAN | 159 | L 4-5 | 76-76 | 3 | 7,887 | Ron Reed | Don Sutton | Don Sutton | Ron Reed | Jim Brewer | 631 | 692 | -61 |
| 1971-09-26 | vs LAN | 160 | L 2-5 | 76-77 | 3 | 18,923 | George Stone | Claude Osteen | Claude Osteen | George Stone | Jim Brewer | 633 | 697 | -64 |
| 1971-09-28 | vs CIN | 161 | W 4-0 | 77-77 | 3 | 4,992 | Phil Niekro | Ross Grimsley | Phil Niekro | Ross Grimsley | | 637 | 697 | -60 |
| 1971-09-30 | vs CIN | 162 | W 6-2 | 77-77 | 3 | 5,317 | Tom House | Milt Wilcox | Tom House | Milt Wilcox | Gary Neibauer | 643 | 699 | -56 |