| 1970-04-08 | @ MON | 1 | W 7-2 | 1-0 | 3 | 21,173 | Bob Gibson | Bill Stoneman | Bob Gibson | Bill Stoneman | Chuck Taylor | 7 | 2 | 5 |
| 1970-04-09 | @ MON | 2 | W 7-3 | 2-0 | 2 | 5,688 | Mike Torrez | Steve Renko | Mike Torrez | Steve Renko | Tom Hilgendorf | 14 | 5 | 9 |
| 1970-04-10 | vs NYN | 3 | W 7-3 | 3-0 | 2 | 45,960 | George Culver | Jim McAndrew | George Culver | Jim McAndrew | Chuck Taylor | 21 | 8 | 13 |
| 1970-04-11 | vs NYN | 4 | L 1-4 | 3-1 | 2 | 17,541 | Nelson Briles | Gary Gentry | Gary Gentry | Nelson Briles | Ron Taylor | 22 | 12 | 10 |
| 1970-04-12 | vs NYN | 5 | L 4-6 | 3-2 | 4 | 17,313 | Steve Carlton | Tom Seaver | Tom Seaver | Steve Carlton | Ron Taylor | 26 | 18 | 8 |
| 1970-04-14 | vs MON | 6 | W 6-5 | 4-2 | 2 | 9,891 | Bob Gibson | Steve Renko | Sal Campisi | Howie Reed | | 32 | 23 | 9 |
| 1970-04-15 | vs MON | 7 | W 10-0 | 5-2 | 1 | 8,193 | Mike Torrez | Joe Sparma | Mike Torrez | Joe Sparma | | 42 | 23 | 19 |
| 1970-04-17 | @ PIT | 8 | W 5-2 | 6-2 | 1 | 14,369 | George Culver | Steve Blass | George Culver | Steve Blass | | 47 | 25 | 22 |
| 1970-04-18 | @ PIT | 9 | W 6-1 | 7-2 | 1 | 8,465 | Steve Carlton | Luke Walker | Steve Carlton | Luke Walker | | 53 | 26 | 27 |
| 1970-04-21 | @ CHN | 10 | L 4-7 | 7-3 | 2 | 5,527 | Bob Gibson | Bill Hands | Bill Hands | Bob Gibson | Phil Regan | 57 | 33 | 24 |
| 1970-04-22 | @ CHN | 11 | L 5-7 | 7-4 | 3 | 8,783 | Mike Torrez | Fergie Jenkins | Fergie Jenkins | Mike Torrez | | 62 | 40 | 22 |
| 1970-04-24 | vs CIN | 12 | W 3-1 | 8-4 | 2 | 40,273 | George Culver | Wayne Simpson | George Culver | Wayne Simpson | | 65 | 41 | 24 |
| 1970-04-25 | vs CIN | 13 | L 2-3 | 8-5 | 3 | 22,119 | Steve Carlton | Jim Merritt | Jim Merritt | Steve Carlton | Don Gullett | 67 | 44 | 23 |
| 1970-04-26 | vs CIN | 14 | W 4-1 | 9-5 | 2 | 18,418 | Bob Gibson | Jim McGlothlin | Bob Gibson | Jim McGlothlin | | 71 | 45 | 26 |
| 1970-04-28 | vs ATL | 15 | L 2-3 | 9-6 | 3 | 12,231 | Mike Torrez | Pat Jarvis | Hoyt Wilhelm | Mike Torrez | | 73 | 48 | 25 |
| 1970-04-29 | vs ATL | 16 | L 6-10 | 9-7 | 3 | 10,562 | George Culver | Jim Nash | Bob Priddy | Chuck Taylor | | 79 | 58 | 21 |
| 1970-05-01 | vs HOU | 17 | L 3-9 | 9-8 | 4 | 10,547 | Steve Carlton | Larry Dierker | Larry Dierker | Steve Carlton | | 82 | 67 | 15 |
| 1970-05-02 | vs HOU | 18 | L 3-5 | 9-9 | 4 | 23,069 | Bob Gibson | Don Wilson | Fred Gladding | Tom Hilgendorf | | 85 | 72 | 13 |
| 1970-05-03 | vs HOU | 19 | W 7-4 | 10-10 | 5 | 0 | Nelson Briles | Tom Griffin | Nelson Briles | Tom Griffin | Jerry Johnson | 92 | 76 | 16 |
| 1970-05-03 | vs HOU | 20 | L 1-8 | 10-10 | 5 | 16,950 | George Culver | Denny Lemaster | Denny Lemaster | George Culver | | 93 | 84 | 9 |
| 1970-05-04 | @ CIN | 21 | L 3-7 | 10-11 | 5 | 8,865 | Mike Torrez | Gary Nolan | Gary Nolan | Mike Torrez | Wayne Granger | 96 | 91 | 5 |
| 1970-05-05 | @ CIN | 22 | L 1-5 | 10-12 | 5 | 11,697 | Steve Carlton | Wayne Simpson | Wayne Simpson | Steve Carlton | | 97 | 96 | 1 |
| 1970-05-08 | @ ATL | 23 | L 7-8 | 10-13 | 5 | 23,711 | Bob Gibson | Pat Jarvis | Bob Priddy | Chuck Taylor | | 104 | 104 | 0 |
| 1970-05-09 | @ ATL | 24 | L 3-5 | 10-14 | 5 | 28,381 | George Culver | Jim Nash | Jim Nash | George Culver | Hoyt Wilhelm | 107 | 109 | -2 |
| 1970-05-10 | @ ATL | 25 | W 6-5 | 11-14 | 5 | 23,166 | Mike Torrez | George Stone | Jerry Johnson | Bob Priddy | Sal Campisi | 113 | 114 | -1 |
| 1970-05-11 | vs PHI | 26 | W 3-0 | 12-14 | 4 | 11,310 | Steve Carlton | Jim Bunning | Steve Carlton | Jim Bunning | | 116 | 114 | 2 |
| 1970-05-12 | vs PHI | 27 | W 9-5 | 13-14 | 3 | 10,454 | Nelson Briles | Chris Short | Chuck Taylor | Lowell Palmer | | 125 | 119 | 6 |
| 1970-05-13 | vs PIT | 28 | L 1-5 | 13-15 | 4 | 12,677 | Bob Gibson | Bob Moose | Bob Moose | Bob Gibson | Dave Giusti | 126 | 124 | 2 |
| 1970-05-14 | vs PIT | 29 | W 11-7 | 14-15 | 3 | 10,840 | George Culver | Dock Ellis | Jerry Johnson | Gene Garber | | 137 | 131 | 6 |
| 1970-05-15 | vs CHN | 30 | W 1-0 | 15-15 | 3 | 24,627 | Mike Torrez | Joe Decker | Mike Torrez | Phil Regan | Billy McCool | 138 | 131 | 7 |
| 1970-05-16 | vs CHN | 31 | L 2-3 | 15-16 | 3 | 27,535 | Steve Carlton | Ken Holtzman | Ken Holtzman | Steve Carlton | Phil Regan | 140 | 134 | 6 |
| 1970-05-17 | vs CHN | 32 | W 4-3 | 16-16 | 3 | 33,799 | Nelson Briles | Fergie Jenkins | Sal Campisi | Fergie Jenkins | Chuck Taylor | 144 | 137 | 7 |
| 1970-05-18 | @ HOU | 33 | L 0-6 | 16-17 | 3 | 17,916 | Bob Gibson | Larry Dierker | Larry Dierker | Bob Gibson | | 144 | 143 | 1 |
| 1970-05-19 | @ HOU | 34 | W 12-3 | 17-17 | 3 | 12,219 | Santiago Guzman | Scipio Spinks | Santiago Guzman | Scipio Spinks | | 156 | 146 | 10 |
| 1970-05-20 | @ HOU | 35 | W 3-2 | 18-17 | 2 | 13,977 | Mike Torrez | Tom Griffin | Mike Torrez | Tom Griffin | Chuck Taylor | 159 | 148 | 11 |
| 1970-05-21 | @ PHI | 36 | L 3-4 | 18-18 | 3 | 11,769 | Steve Carlton | Woodie Fryman | Joe Hoerner | Frank Linzy | | 162 | 152 | 10 |
| 1970-05-22 | @ PHI | 37 | W 6-3 | 19-18 | 2 | 12,003 | Nelson Briles | Grant Jackson | Frank Linzy | Mike Jackson | | 168 | 155 | 13 |
| 1970-05-23 | @ PHI | 38 | W 3-1 | 20-18 | 2 | 12,333 | Bob Gibson | Jim Bunning | Bob Gibson | Jim Bunning | | 171 | 156 | 15 |
| 1970-05-24 | @ PHI | 39 | L 5-6 | 20-19 | 2 | 11,939 | Santiago Guzman | Chris Short | Mike Jackson | Chuck Taylor | | 176 | 162 | 14 |
| 1970-05-26 | @ NYN | 40 | L 1-5 | 20-20 | 3 | 13,473 | Mike Torrez | Ray Sadecki | Ray Sadecki | Mike Torrez | | 177 | 167 | 10 |
| 1970-05-27 | @ NYN | 41 | L 0-3 | 20-21 | 3 | 28,597 | Steve Carlton | Gary Gentry | Gary Gentry | Steve Carlton | | 177 | 170 | 7 |
| 1970-05-28 | @ NYN | 42 | W 9-2 | 21-21 | 3 | 20,919 | Bob Gibson | Jim McAndrew | Bob Gibson | Jim McAndrew | | 186 | 172 | 14 |
| 1970-05-29 | vs LAN | 43 | L 6-8 | 21-22 | 3 | 30,536 | Nelson Briles | Alan Foster | Jose Pena | Billy McCool | Jim Brewer | 192 | 180 | 12 |
| 1970-05-30 | vs LAN | 44 | L 6-7 | 21-23 | 3 | 22,437 | Santiago Guzman | Claude Osteen | Claude Osteen | Santiago Guzman | Joe Moeller | 198 | 187 | 11 |
| 1970-05-31 | vs LAN | 45 | L 6-8 | 21-24 | 4 | 17,166 | Mike Torrez | Sandy Vance | Jose Pena | George Culver | | 204 | 195 | 9 |
| 1970-06-02 | vs SFN | 46 | W 12-1 | 22-24 | 3 | 11,111 | Steve Carlton | Gaylord Perry | Steve Carlton | Gaylord Perry | | 216 | 196 | 20 |
| 1970-06-03 | vs SFN | 47 | W 6-5 | 23-24 | 3 | 11,808 | Bob Gibson | Rich Robertson | Bob Gibson | Frank Reberger | | 222 | 201 | 21 |
| 1970-06-05 | vs SDN | 48 | L 2-3 | 23-25 | 3 | 14,856 | Mike Torrez | Pat Dobson | Pat Dobson | Mike Torrez | Roberto Rodriguez | 224 | 204 | 20 |
| 1970-06-06 | vs SDN | 49 | L 4-5 | 23-26 | 4 | 49,027 | Steve Carlton | Mike Corkins | Ron Herbel | Steve Carlton | Tom Dukes | 228 | 209 | 19 |
| 1970-06-07 | vs SDN | 50 | W 10-7 | 24-26 | 3 | 18,474 | Bob Gibson | Danny Coombs | Bob Gibson | Ron Herbel | Ted Abernathy | 238 | 216 | 22 |
| 1970-06-09 | @ LAN | 51 | W 4-0 | 25-26 | 4 | 17,111 | Chuck Taylor | Claude Osteen | Chuck Taylor | Claude Osteen | | 242 | 216 | 26 |
| 1970-06-10 | @ LAN | 52 | L 2-4 | 25-27 | 4 | 16,516 | Mike Torrez | Joe Moeller | Joe Moeller | Mike Torrez | | 244 | 220 | 24 |
| 1970-06-11 | @ LAN | 53 | L 1-2 | 25-28 | 4 | 17,487 | Steve Carlton | Don Sutton | Jim Brewer | Frank Linzy | | 245 | 222 | 23 |
| 1970-06-12 | @ SFN | 54 | W 4-1 | 26-28 | 4 | 8,634 | Bob Gibson | Skip Pitlock | Bob Gibson | Skip Pitlock | | 249 | 223 | 26 |
| 1970-06-13 | @ SFN | 55 | L 5-6 | 26-29 | 4 | 15,651 | Nelson Briles | Rich Robertson | Don McMahon | Sal Campisi | | 254 | 229 | 25 |
| 1970-06-14 | @ SFN | 56 | L 4-7 | 26-30 | 4 | 13,955 | Chuck Taylor | Juan Marichal | Juan Marichal | Chuck Taylor | | 258 | 236 | 22 |
| 1970-06-15 | @ SDN | 57 | W 5-4 | 27-30 | 4 | 5,324 | Mike Torrez | Pat Dobson | Mike Torrez | Pat Dobson | | 263 | 240 | 23 |
| 1970-06-16 | @ SDN | 58 | L 0-4 | 27-31 | 4 | 7,012 | Steve Carlton | Mike Corkins | Dave Roberts | Steve Carlton | | 263 | 244 | 19 |
| 1970-06-17 | @ SDN | 59 | W 8-0 | 28-31 | 4 | 13,624 | Bob Gibson | Danny Coombs | Bob Gibson | Danny Coombs | | 271 | 244 | 27 |
| 1970-06-19 | @ CHN | 60 | W 5-3 | 29-31 | 4 | 29,320 | Chuck Taylor | Joe Decker | Al Hrabosky | Steve Barber | | 276 | 247 | 29 |
| 1970-06-20 | @ CHN | 61 | L 3-8 | 29-32 | 4 | 27,351 | Mike Torrez | Bill Hands | Bill Hands | Mike Torrez | | 279 | 255 | 24 |
| 1970-06-21 | @ CHN | 62 | W 3-0 | 31-32 | 4 | 0 | Steve Carlton | Ken Holtzman | Steve Carlton | Ken Holtzman | | 282 | 255 | 27 |
| 1970-06-21 | @ CHN | 63 | W 3-2 | 31-32 | 4 | 36,583 | Bob Gibson | Jim Colborn | Bob Gibson | Phil Regan | | 285 | 257 | 28 |
| 1970-06-22 | @ PIT | 64 | W 6-1 | 32-33 | 4 | 0 | Jerry Reuss | Dock Ellis | Jerry Reuss | Dock Ellis | | 291 | 258 | 33 |
| 1970-06-22 | @ PIT | 65 | L 0-1 | 32-33 | 4 | 15,158 | Mike Torrez | Jim Nelson | Jim Nelson | Frank Linzy | | 291 | 259 | 32 |
| 1970-06-23 | @ PIT | 66 | L 2-7 | 32-34 | 4 | 7,654 | Chuck Taylor | Bob Moose | Bob Moose | Chuck Taylor | | 293 | 266 | 27 |
| 1970-06-24 | @ PIT | 67 | L 3-4 | 32-35 | 4 | 8,095 | Al Hrabosky | Steve Blass | Luke Walker | Billy McCool | | 296 | 270 | 26 |
| 1970-06-25 | @ PIT | 68 | L 2-3 | 32-36 | 4 | 9,910 | Steve Carlton | Bob Veale | Dave Giusti | Steve Carlton | | 298 | 273 | 25 |
| 1970-06-26 | vs PHI | 69 | W 7-0 | 33-36 | 4 | 40,221 | Bob Gibson | Rick Wise | Bob Gibson | Rick Wise | | 305 | 273 | 32 |
| 1970-06-27 | vs PHI | 70 | W 9-8 | 34-36 | 4 | 20,549 | Jerry Reuss | Woodie Fryman | Ted Abernathy | Joe Hoerner | Sal Campisi | 314 | 281 | 33 |
| 1970-06-28 | vs PHI | 71 | W 5-4 | 35-37 | 4 | 0 | Mike Torrez | Jim Bunning | Mike Torrez | Dick Selma | | 319 | 285 | 34 |
| 1970-06-28 | vs PHI | 72 | L 3-8 | 35-37 | 4 | 38,194 | Chuck Taylor | Chris Short | Dick Selma | Billy McCool | | 322 | 293 | 29 |
| 1970-06-29 | vs CHN | 73 | W 8-6 | 36-37 | 3 | 28,910 | Steve Carlton | Ken Holtzman | Steve Carlton | Phil Regan | | 330 | 299 | 31 |
| 1970-06-30 | vs CHN | 74 | W 5-4 | 37-37 | 3 | 34,039 | Bob Gibson | Joe Decker | Bob Gibson | Larry Gura | | 335 | 303 | 32 |
| 1970-07-01 | vs CHN | 75 | L 0-5 | 37-38 | 3 | 26,006 | Jerry Reuss | Fergie Jenkins | Fergie Jenkins | Jerry Reuss | | 335 | 308 | 27 |
| 1970-07-02 | @ MON | 76 | L 10-13 | 37-39 | 4 | 17,576 | Mike Torrez | Carl Morton | Carl Morton | Mike Torrez | Claude Raymond | 345 | 321 | 24 |
| 1970-07-03 | @ MON | 77 | W 9-7 | 38-39 | 3 | 17,262 | Chuck Taylor | Bill Stoneman | Chuck Taylor | Bill Stoneman | Sal Campisi | 354 | 328 | 26 |
| 1970-07-04 | @ MON | 78 | L 0-8 | 38-40 | 3 | 23,715 | Steve Carlton | Steve Renko | Steve Renko | Steve Carlton | | 354 | 336 | 18 |
| 1970-07-05 | @ MON | 79 | W 6-3 | 39-40 | 3 | 24,174 | Bob Gibson | Rich Nye | Bob Gibson | Rich Nye | | 360 | 339 | 21 |
| 1970-07-06 | @ NYN | 80 | L 3-10 | 39-41 | 4 | 36,801 | Jerry Reuss | Jim McAndrew | Jim McAndrew | Jerry Reuss | Tug McGraw | 363 | 349 | 14 |
| 1970-07-07 | @ NYN | 81 | L 3-4 | 39-42 | 4 | 42,858 | Mike Torrez | Gary Gentry | Danny Frisella | Sal Campisi | | 366 | 353 | 13 |
| 1970-07-08 | @ NYN | 82 | L 5-7 | 39-43 | 4 | 38,932 | Nelson Briles | Ray Sadecki | Ray Sadecki | Nelson Briles | Ron Taylor | 371 | 360 | 11 |
| 1970-07-09 | vs PIT | 83 | L 0-6 | 39-44 | 4 | 22,345 | Steve Carlton | Dock Ellis | Dock Ellis | Steve Carlton | | 371 | 366 | 5 |
| 1970-07-10 | vs PIT | 84 | L 2-6 | 39-45 | 4 | 23,920 | Bob Gibson | Jim Nelson | Dave Giusti | Bob Gibson | | 373 | 372 | 1 |
| 1970-07-11 | vs PIT | 85 | L 7-8 | 39-46 | 4 | 25,686 | Jerry Reuss | Bob Veale | Bruce Dal Canton | Chuck Taylor | Orlando Pena | 380 | 380 | 0 |
| 1970-07-12 | vs PIT | 86 | L 6-7 | 39-47 | 4 | 45,776 | Mike Torrez | Steve Blass | Dave Giusti | Al Hrabosky | Bruce Dal Canton | 386 | 387 | -1 |
| 1970-07-16 | vs ATL | 87 | L 3-7 | 39-48 | 4 | 21,324 | Steve Carlton | Pat Jarvis | Pat Jarvis | Steve Carlton | | 389 | 394 | -5 |
| 1970-07-17 | vs ATL | 88 | W 11-6 | 40-48 | 4 | 20,899 | Nelson Briles | George Stone | Nelson Briles | George Stone | Frank Linzy | 400 | 400 | 0 |
| 1970-07-18 | vs ATL | 89 | L 7-8 | 40-49 | 4 | 32,593 | Bob Gibson | Jim Nash | Hoyt Wilhelm | Frank Linzy | | 407 | 408 | -1 |
| 1970-07-19 | vs ATL | 90 | W 3-1 | 41-49 | 4 | 24,415 | Mike Torrez | Ron Reed | Mike Torrez | Ron Reed | | 410 | 409 | 1 |
| 1970-07-20 | vs CIN | 91 | L 3-4 | 41-51 | 4 | 0 | Jerry Reuss | Gary Nolan | Gary Nolan | Jerry Reuss | Wayne Granger | 413 | 413 | 0 |
| 1970-07-20 | vs CIN | 92 | L 0-4 | 41-51 | 4 | 32,557 | Chuck Taylor | Tony Cloninger | Wayne Granger | Bob Chlupsa | | 413 | 417 | -4 |
| 1970-07-21 | vs CIN | 93 | L 5-6 | 41-52 | 5 | 25,288 | Steve Carlton | Wayne Simpson | Clay Carroll | Steve Carlton | Wayne Granger | 418 | 423 | -5 |
| 1970-07-22 | vs HOU | 94 | L 9-13 | 41-53 | 5 | 16,315 | Nelson Briles | Larry Dierker | George Culver | Nelson Briles | Fred Gladding | 427 | 436 | -9 |
| 1970-07-23 | vs HOU | 95 | L 2-3 | 41-54 | 6 | 17,532 | Bob Gibson | Jack Billingham | Jack Billingham | Bob Gibson | | 429 | 439 | -10 |
| 1970-07-24 | @ CIN | 96 | L 0-4 | 41-55 | 6 | 51,019 | Mike Torrez | Gary Nolan | Gary Nolan | Mike Torrez | Wayne Granger | 429 | 443 | -14 |
| 1970-07-25 | @ CIN | 97 | L 3-5 | 41-56 | 6 | 49,223 | Jerry Reuss | Tony Cloninger | Tony Cloninger | Jerry Reuss | Clay Carroll | 432 | 448 | -16 |
| 1970-07-26 | @ CIN | 98 | L 5-12 | 41-57 | 6 | 40,202 | Steve Carlton | Wayne Simpson | Wayne Simpson | Steve Carlton | Wayne Granger | 437 | 460 | -23 |
| 1970-07-27 | @ CIN | 99 | W 16-9 | 42-57 | 6 | 21,013 | Nelson Briles | Jim Merritt | Chuck Taylor | Jim Merritt | Frank Linzy | 453 | 469 | -16 |
| 1970-07-28 | @ ATL | 100 | W 6-4 | 43-57 | 6 | 13,904 | Bob Gibson | Jim Nash | Bob Gibson | Jim Nash | | 459 | 473 | -14 |
| 1970-07-29 | @ ATL | 101 | L 7-9 | 43-58 | 6 | 8,499 | Mike Torrez | Ron Reed | Ron Reed | Frank Linzy | Hoyt Wilhelm | 466 | 482 | -16 |
| 1970-07-30 | @ ATL | 102 | W 4-2 | 44-58 | 6 | 9,895 | Jerry Reuss | Phil Niekro | Jerry Reuss | Phil Niekro | Chuck Taylor | 470 | 484 | -14 |
| 1970-07-31 | @ HOU | 103 | W 5-1 | 45-58 | 6 | 21,697 | Steve Carlton | Ron Cook | Steve Carlton | Ron Cook | | 475 | 485 | -10 |
| 1970-08-01 | @ HOU | 104 | W 14-7 | 46-58 | 6 | 29,923 | Nelson Briles | Don Wilson | Nelson Briles | Don Wilson | Sal Campisi | 489 | 492 | -3 |
| 1970-08-02 | @ HOU | 105 | W 3-2 | 47-58 | 5 | 23,965 | Bob Gibson | Jack Billingham | Bob Gibson | Jack Billingham | | 492 | 494 | -2 |
| 1970-08-03 | @ PHI | 106 | W 4-1 | 48-58 | 5 | 12,163 | Mike Torrez | Grant Jackson | Mike Torrez | Grant Jackson | | 496 | 495 | 1 |
| 1970-08-04 | @ PHI | 107 | W 3-2 | 49-58 | 4 | 14,253 | Jerry Reuss | Chris Short | Jerry Reuss | Chris Short | Chuck Taylor | 499 | 497 | 2 |
| 1970-08-05 | vs NYN | 108 | L 3-5 | 49-59 | 4 | 24,188 | Steve Carlton | Danny Frisella | Danny Frisella | Steve Carlton | Ron Taylor | 502 | 502 | 0 |
| 1970-08-06 | vs NYN | 109 | W 3-0 | 50-59 | 4 | 23,412 | Nelson Briles | Tom Seaver | Nelson Briles | Tom Seaver | | 505 | 502 | 3 |
| 1970-08-07 | vs MON | 110 | W 2-1 | 51-59 | 4 | 18,990 | Bob Gibson | Dan McGinn | Bob Gibson | Dan McGinn | | 507 | 503 | 4 |
| 1970-08-08 | vs MON | 111 | W 11-10 | 52-59 | 4 | 17,341 | Harry Parker | Mike Marshall | Al Hrabosky | Claude Raymond | | 518 | 513 | 5 |
| 1970-08-09 | vs MON | 112 | L 6-7 | 53-60 | 4 | 0 | Steve Carlton | Mike Wegener | Mike Wegener | Steve Carlton | Steve Renko | 524 | 520 | 4 |
| 1970-08-09 | vs MON | 113 | W 4-0 | 53-60 | 4 | 28,479 | Jerry Reuss | Bill Stoneman | Jerry Reuss | Bill Stoneman | | 528 | 520 | 8 |
| 1970-08-11 | vs SDN | 114 | W 11-10 | 54-60 | 4 | 16,734 | Nelson Briles | Earl Wilson | Harry Parker | Ron Herbel | | 539 | 530 | 9 |
| 1970-08-12 | vs SDN | 115 | W 5-4 | 55-60 | 4 | 18,563 | Bob Gibson | Danny Coombs | Bob Gibson | Ron Willis | | 544 | 534 | 10 |
| 1970-08-13 | vs SDN | 116 | L 7-9 | 55-61 | 4 | 30,021 | Reggie Cleveland | Clay Kirby | Clay Kirby | Reggie Cleveland | Ron Herbel | 551 | 543 | 8 |
| 1970-08-14 | vs SFN | 117 | W 2-1 | 56-62 | 4 | 0 | Steve Carlton | Juan Marichal | Chuck Taylor | Don McMahon | | 553 | 544 | 9 |
| 1970-08-14 | vs SFN | 118 | L 4-5 | 56-62 | 4 | 36,349 | Jerry Reuss | Skip Pitlock | Don McMahon | Tom Hilgendorf | Mike Davison | 557 | 549 | 8 |
| 1970-08-15 | vs SFN | 119 | L 2-3 | 56-63 | 4 | 35,835 | Nelson Briles | Frank Reberger | Don Carrithers | Nelson Briles | Jerry Johnson | 559 | 552 | 7 |
| 1970-08-16 | vs SFN | 120 | L 2-5 | 56-64 | 4 | 28,093 | Harry Parker | Ron Bryant | Ron Bryant | Reggie Cleveland | Jerry Johnson | 561 | 557 | 4 |
| 1970-08-17 | vs LAN | 121 | W 11-8 | 57-64 | 4 | 21,114 | Bob Gibson | Don Sutton | Bob Gibson | Don Sutton | Chuck Taylor | 572 | 565 | 7 |
| 1970-08-18 | vs LAN | 122 | L 2-7 | 57-65 | 4 | 24,532 | Jerry Reuss | Sandy Vance | Sandy Vance | Jerry Reuss | | 574 | 572 | 2 |
| 1970-08-19 | vs LAN | 123 | L 2-4 | 57-66 | 4 | 21,499 | Steve Carlton | Joe Moeller | Jim Brewer | Steve Carlton | Pete Mikkelsen | 576 | 576 | 0 |
| 1970-08-21 | @ SDN | 124 | W 14-8 | 58-66 | 4 | 9,721 | Nelson Briles | Earl Wilson | Nelson Briles | Earl Wilson | Chuck Taylor | 590 | 584 | 6 |
| 1970-08-22 | @ SDN | 125 | W 7-0 | 59-66 | 4 | 6,942 | Bob Gibson | Danny Coombs | Bob Gibson | Danny Coombs | | 597 | 584 | 13 |
| 1970-08-23 | @ SDN | 126 | W 8-7 | 60-66 | 4 | 5,797 | Jerry Reuss | Clay Kirby | Frank Linzy | Pat Dobson | | 605 | 591 | 14 |
| 1970-08-25 | @ SFN | 127 | L 2-4 | 60-67 | 4 | 5,025 | Steve Carlton | Skip Pitlock | Skip Pitlock | Steve Carlton | Don McMahon | 607 | 595 | 12 |
| 1970-08-26 | @ SFN | 128 | L 7-8 | 60-68 | 4 | 5,643 | Nelson Briles | Frank Reberger | Mike Davison | Tom Hilgendorf | | 614 | 603 | 11 |
| 1970-08-27 | @ SFN | 129 | W 4-1 | 61-68 | 4 | 6,317 | Bob Gibson | Gaylord Perry | Bob Gibson | Gaylord Perry | | 618 | 604 | 14 |
| 1970-08-28 | @ LAN | 130 | W 1-0 | 62-68 | 4 | 19,964 | Jerry Reuss | Don Sutton | Jerry Reuss | Don Sutton | | 619 | 604 | 15 |
| 1970-08-29 | @ LAN | 131 | W 3-2 | 63-68 | 4 | 25,001 | Frank Bertaina | Alan Foster | Chuck Taylor | Jim Brewer | Tom Hilgendorf | 622 | 606 | 16 |
| 1970-08-30 | @ LAN | 132 | W 2-1 | 64-68 | 4 | 18,535 | Steve Carlton | Sandy Vance | Steve Carlton | Sandy Vance | | 624 | 607 | 17 |
| 1970-08-31 | vs NYN | 133 | L 5-11 | 64-69 | 4 | 17,284 | Nelson Briles | Jerry Koosman | Jerry Koosman | Nelson Briles | Ron Taylor | 629 | 618 | 11 |
| 1970-09-01 | vs NYN | 134 | L 3-4 | 64-70 | 4 | 22,527 | Bob Gibson | Jim McAndrew | Ron Herbel | Bob Gibson | Tug McGraw | 632 | 622 | 10 |
| 1970-09-02 | vs NYN | 135 | L 3-7 | 64-71 | 4 | 13,749 | Jerry Reuss | Tom Seaver | Tom Seaver | Jerry Reuss | | 635 | 629 | 6 |
| 1970-09-03 | vs NYN | 136 | W 5-3 | 65-71 | 4 | 13,169 | Steve Carlton | Gary Gentry | Steve Carlton | Gary Gentry | | 640 | 632 | 8 |
| 1970-09-04 | vs MON | 137 | L 7-9 | 65-72 | 4 | 20,970 | Mike Torrez | Steve Renko | Claude Raymond | Reggie Cleveland | | 647 | 641 | 6 |
| 1970-09-05 | vs MON | 138 | L 0-6 | 65-73 | 4 | 16,143 | Frank Bertaina | Bill Stoneman | Bill Stoneman | Frank Bertaina | | 647 | 647 | 0 |
| 1970-09-06 | vs MON | 139 | W 7-2 | 66-73 | 4 | 17,215 | Bob Gibson | John O'Donoghue | Bob Gibson | John O'Donoghue | | 654 | 649 | 5 |
| 1970-09-07 | @ PHI | 140 | L 1-5 | 66-75 | 4 | 0 | Jerry Reuss | Chris Short | Chris Short | Jerry Reuss | | 655 | 654 | 1 |
| 1970-09-07 | @ PHI | 141 | L 2-3 | 66-75 | 4 | 14,166 | Mike Torrez | Lowell Palmer | Joe Hoerner | Bob Chlupsa | | 657 | 657 | 0 |
| 1970-09-08 | @ PHI | 142 | W 6-3 | 67-75 | 4 | 3,995 | Steve Carlton | Rick Wise | Steve Carlton | Rick Wise | | 663 | 660 | 3 |
| 1970-09-09 | @ PIT | 143 | W 6-4 | 68-75 | 4 | 14,927 | Frank Bertaina | Fred Cambria | Frank Bertaina | Fred Cambria | Tom Hilgendorf | 669 | 664 | 5 |
| 1970-09-10 | @ PIT | 144 | L 0-2 | 68-76 | 4 | 14,386 | Nelson Briles | Luke Walker | Luke Walker | Nelson Briles | | 669 | 666 | 3 |
| 1970-09-11 | @ NYN | 145 | W 5-2 | 69-76 | 4 | 50,555 | Bob Gibson | Tom Seaver | Bob Gibson | Tom Seaver | | 674 | 668 | 6 |
| 1970-09-12 | @ NYN | 146 | L 0-3 | 69-77 | 4 | 35,402 | Jerry Reuss | Jim McAndrew | Jim McAndrew | Jerry Reuss | | 674 | 671 | 3 |
| 1970-09-13 | @ NYN | 147 | W 5-4 | 70-77 | 4 | 43,592 | Mike Torrez | Gary Gentry | Frank Linzy | Ron Herbel | | 679 | 675 | 4 |
| 1970-09-15 | @ CHN | 148 | L 3-5 | 70-78 | 4 | 13,727 | Steve Carlton | Ken Holtzman | Ken Holtzman | Steve Carlton | Phil Regan | 682 | 680 | 2 |
| 1970-09-16 | @ CHN | 149 | W 8-1 | 71-78 | 4 | 21,121 | Bob Gibson | Milt Pappas | Bob Gibson | Milt Pappas | | 690 | 681 | 9 |
| 1970-09-17 | @ CHN | 150 | W 9-2 | 72-78 | 4 | 16,605 | Jerry Reuss | Bill Hands | Jerry Reuss | Bill Hands | | 699 | 683 | 16 |
| 1970-09-18 | vs PHI | 151 | L 7-9 | 72-79 | 4 | 12,385 | Mike Torrez | Lowell Palmer | Grant Jackson | Nelson Briles | Dick Selma | 706 | 692 | 14 |
| 1970-09-19 | vs PHI | 152 | L 6-10 | 72-80 | 4 | 11,143 | Frank Bertaina | Rick Wise | Rick Wise | Frank Bertaina | Fred Wenz | 712 | 702 | 10 |
| 1970-09-20 | vs PHI | 153 | L 4-7 | 72-81 | 4 | 14,681 | Steve Carlton | Barry Lersch | Dick Selma | Harry Parker | | 716 | 709 | 7 |
| 1970-09-23 | vs CHN | 154 | W 2-1 | 74-81 | 4 | 0 | Bob Gibson | Fergie Jenkins | Bob Gibson | Fergie Jenkins | | 718 | 710 | 8 |
| 1970-09-23 | vs CHN | 155 | W 2-1 | 74-81 | 4 | 21,340 | Jerry Reuss | Bill Hands | Jerry Reuss | Bill Hands | | 720 | 711 | 9 |
| 1970-09-24 | vs CHN | 156 | L 1-7 | 74-82 | 4 | 15,955 | Mike Torrez | Ken Holtzman | Ken Holtzman | Mike Torrez | | 721 | 718 | 3 |
| 1970-09-25 | @ MON | 157 | L 5-7 | 74-83 | 4 | 20,998 | Frank Bertaina | John O'Donoghue | Howie Reed | Chuck Taylor | | 726 | 725 | 1 |
| 1970-09-26 | @ MON | 158 | W 7-2 | 75-83 | 4 | 19,120 | Steve Carlton | Bill Stoneman | Steve Carlton | Dan McGinn | | 733 | 727 | 6 |
| 1970-09-27 | @ MON | 159 | L 0-1 | 75-84 | 4 | 30,029 | Harry Parker | Carl Morton | Carl Morton | Tom Hilgendorf | | 733 | 728 | 5 |
| 1970-09-29 | vs PIT | 160 | L 2-7 | 75-85 | 4 | 13,232 | Bob Gibson | Luke Walker | Bruce Dal Canton | Bob Gibson | John Lamb | 735 | 735 | 0 |
| 1970-09-30 | vs PIT | 161 | W 4-3 | 76-85 | 4 | 8,084 | Jerry Reuss | Bob Veale | Nelson Briles | Mudcat Grant | | 739 | 738 | 1 |
| 1970-10-01 | vs PIT | 162 | L 5-9 | 76-86 | 4 | 8,457 | Harry Parker | Steve Blass | George Brunet | Reggie Cleveland | Ed Acosta | 744 | 747 | -3 |