| 1970-04-07 | vs NYN | 1 | L 3-5 | 0-1 | 5 | 34,249 | Steve Blass | Tom Seaver | Ron Taylor | Chuck Hartenstein | Tug McGraw | 3 | 5 | -2 |
| 1970-04-09 | vs NYN | 2 | W 2-1 | 1-1 | 4 | 9,884 | Dock Ellis | Jerry Koosman | Dock Ellis | Jerry Koosman | | 5 | 6 | -1 |
| 1970-04-10 | @ PHI | 3 | L 0-2 | 1-2 | 5 | 3,663 | Bob Veale | Woodie Fryman | Woodie Fryman | Bob Veale | | 5 | 8 | -3 |
| 1970-04-11 | @ PHI | 4 | W 4-0 | 2-2 | 4 | 7,673 | Luke Walker | Grant Jackson | Luke Walker | Grant Jackson | Chuck Hartenstein | 9 | 8 | 1 |
| 1970-04-12 | @ PHI | 5 | W 3-1 | 3-2 | 3 | 22,395 | Steve Blass | Jim Bunning | Steve Blass | Jim Bunning | | 12 | 9 | 3 |
| 1970-04-14 | @ NYN | 6 | W 6-4 | 4-2 | 1 | 41,679 | Dock Ellis | Jerry Koosman | Chuck Hartenstein | Tug McGraw | | 18 | 13 | 5 |
| 1970-04-16 | @ NYN | 7 | W 7-4 | 5-2 | 1 | 8,623 | Bob Veale | Gary Gentry | Bruce Dal Canton | Don Cardwell | | 25 | 17 | 8 |
| 1970-04-17 | vs SLN | 8 | L 2-5 | 5-3 | 3 | 14,369 | Steve Blass | George Culver | George Culver | Steve Blass | | 27 | 22 | 5 |
| 1970-04-18 | vs SLN | 9 | L 1-6 | 5-4 | 4 | 8,465 | Luke Walker | Steve Carlton | Steve Carlton | Luke Walker | | 28 | 28 | 0 |
| 1970-04-20 | vs HOU | 10 | W 3-1 | 6-4 | 3 | 4,051 | Dock Ellis | Jim Bouton | Dock Ellis | Jim Bouton | Dave Giusti | 31 | 29 | 2 |
| 1970-04-21 | vs HOU | 11 | W 9-8 | 7-4 | 3 | 3,589 | Bob Veale | Larry Dierker | Bob Veale | Larry Dierker | Joe Gibbon | 40 | 37 | 3 |
| 1970-04-22 | vs HOU | 12 | W 6-1 | 8-4 | 2 | 6,178 | Steve Blass | Denny Lemaster | Steve Blass | Denny Lemaster | | 46 | 38 | 8 |
| 1970-04-23 | vs ATL | 13 | W 8-6 | 9-4 | 2 | 4,987 | Luke Walker | Pat Jarvis | Luke Walker | Pat Jarvis | Dave Giusti | 54 | 44 | 10 |
| 1970-04-24 | vs ATL | 14 | L 0-9 | 9-5 | 3 | 5,413 | Bob Moose | Jim Nash | Jim Nash | Bob Moose | | 54 | 53 | 1 |
| 1970-04-25 | vs ATL | 15 | W 8-7 | 10-5 | 2 | 7,125 | Dock Ellis | George Stone | Dave Giusti | Hoyt Wilhelm | Al McBean | 62 | 60 | 2 |
| 1970-04-26 | vs ATL | 16 | L 0-2 | 10-6 | 3 | 15,307 | Bob Veale | Phil Niekro | Phil Niekro | Bob Veale | | 62 | 62 | 0 |
| 1970-04-27 | vs CHN | 17 | L 0-1 | 10-7 | 3 | 6,635 | Steve Blass | Joe Decker | Joe Decker | Steve Blass | Phil Regan | 62 | 63 | -1 |
| 1970-04-28 | vs CHN | 18 | W 6-1 | 11-7 | 2 | 6,717 | Luke Walker | Ken Holtzman | Luke Walker | Ken Holtzman | Dave Giusti | 68 | 64 | 4 |
| 1970-04-29 | vs CHN | 19 | L 5-10 | 11-8 | 2 | 7,900 | Bob Moose | Bill Hands | Bill Hands | Bob Moose | Phil Regan | 73 | 74 | -1 |
| 1970-05-01 | @ CIN | 20 | L 4-6 | 11-9 | 3 | 19,470 | Dock Ellis | Wayne Simpson | Wayne Simpson | Dock Ellis | Don Gullett | 77 | 80 | -3 |
| 1970-05-02 | @ CIN | 21 | L 2-7 | 11-10 | 3 | 7,721 | Bob Veale | Jim McGlothlin | Jim McGlothlin | Bob Veale | | 79 | 87 | -8 |
| 1970-05-03 | @ CIN | 22 | L 7-11 | 11-11 | 4 | 15,219 | Steve Blass | Jim Merritt | Jim Merritt | Steve Blass | Clay Carroll | 86 | 98 | -12 |
| 1970-05-04 | @ ATL | 23 | L 3-5 | 11-12 | 4 | 7,457 | Luke Walker | Jim Nash | Jim Nash | Luke Walker | Bob Priddy | 89 | 103 | -14 |
| 1970-05-05 | @ ATL | 24 | L 6-12 | 11-13 | 4 | 9,199 | Bob Moose | George Stone | George Stone | Bob Moose | Hoyt Wilhelm | 95 | 115 | -20 |
| 1970-05-06 | @ ATL | 25 | L 0-3 | 11-14 | 5 | 9,782 | Dock Ellis | Phil Niekro | Phil Niekro | Dock Ellis | | 95 | 118 | -23 |
| 1970-05-07 | @ HOU | 26 | W 9-5 | 12-14 | 4 | 11,678 | Bob Veale | Don Wilson | Luke Walker | Jim Bouton | Dave Giusti | 104 | 123 | -19 |
| 1970-05-08 | @ HOU | 27 | L 5-7 | 12-15 | 4 | 13,383 | Steve Blass | Denny Lemaster | Jim Ray | Steve Blass | | 109 | 130 | -21 |
| 1970-05-09 | @ HOU | 28 | W 6-3 | 13-15 | 4 | 15,137 | Bob Moose | Tom Griffin | Bob Moose | Tom Griffin | | 115 | 133 | -18 |
| 1970-05-10 | @ HOU | 29 | L 2-9 | 13-16 | 4 | 16,768 | Dock Ellis | Larry Dierker | Larry Dierker | Dock Ellis | | 117 | 142 | -25 |
| 1970-05-11 | vs CIN | 30 | W 4-1 | 14-16 | 3 | 7,722 | Bob Veale | Jim McGlothlin | Bob Veale | Jim McGlothlin | | 121 | 143 | -22 |
| 1970-05-12 | vs CIN | 31 | L 3-5 | 14-17 | 4 | 7,502 | Steve Blass | Jim Merritt | Jim Merritt | Steve Blass | | 124 | 148 | -24 |
| 1970-05-13 | @ SLN | 32 | W 5-1 | 15-17 | 3 | 12,677 | Bob Moose | Bob Gibson | Bob Moose | Bob Gibson | Dave Giusti | 129 | 149 | -20 |
| 1970-05-14 | @ SLN | 33 | L 7-11 | 15-18 | 4 | 10,840 | Dock Ellis | George Culver | Jerry Johnson | Gene Garber | | 136 | 160 | -24 |
| 1970-05-15 | vs MON | 34 | L 1-2 | 15-19 | 4 | 7,883 | Bob Veale | Dan McGinn | Dan McGinn | Bob Veale | | 137 | 162 | -25 |
| 1970-05-16 | vs MON | 35 | W 4-3 | 16-19 | 4 | 4,237 | Steve Blass | Carl Morton | Luke Walker | Claude Raymond | | 141 | 165 | -24 |
| 1970-05-17 | vs MON | 36 | L 7-8 | 16-20 | 4 | 8,604 | Dave Giusti | Steve Renko | John Strohmayer | Gene Garber | Claude Raymond | 148 | 173 | -25 |
| 1970-05-18 | vs PHI | 37 | W 2-1 | 17-20 | 4 | 5,796 | Bob Moose | Jim Bunning | Bob Moose | Jim Bunning | | 150 | 174 | -24 |
| 1970-05-19 | vs PHI | 38 | L 0-2 | 17-21 | 4 | 6,251 | Dock Ellis | Chris Short | Chris Short | Dock Ellis | | 150 | 176 | -26 |
| 1970-05-20 | vs PHI | 39 | W 3-2 | 18-21 | 4 | 5,977 | Bob Veale | Rick Wise | Bruce Dal Canton | Dick Selma | | 153 | 178 | -25 |
| 1970-05-21 | @ MON | 40 | L 6-7 | 18-22 | 4 | 13,346 | Steve Blass | Steve Renko | Bill Dillman | Luke Walker | | 159 | 185 | -26 |
| 1970-05-22 | @ MON | 41 | L 3-6 | 18-23 | 4 | 10,576 | Bob Moose | Bill Stoneman | Bill Stoneman | Bob Moose | | 162 | 191 | -29 |
| 1970-05-23 | @ MON | 42 | W 8-4 | 19-23 | 4 | 28,702 | Dock Ellis | Dan McGinn | Dock Ellis | Dan McGinn | Dave Giusti | 170 | 195 | -25 |
| 1970-05-24 | @ MON | 43 | W 3-0 | 20-23 | 4 | 29,306 | Bob Veale | Carl Morton | Bob Veale | Carl Morton | | 173 | 195 | -22 |
| 1970-05-26 | @ CHN | 44 | L 3-6 | 20-24 | 4 | 12,440 | Steve Blass | Ken Holtzman | Ken Holtzman | Steve Blass | | 176 | 201 | -25 |
| 1970-05-27 | @ CHN | 45 | W 4-0 | 21-24 | 4 | 11,002 | Bob Moose | Fergie Jenkins | Bob Moose | Fergie Jenkins | | 180 | 201 | -21 |
| 1970-05-28 | @ CHN | 46 | L 7-8 | 21-25 | 4 | 10,805 | Dock Ellis | Bill Hands | Jim Colborn | Gene Garber | | 187 | 209 | -22 |
| 1970-05-29 | vs SFN | 47 | W 6-3 | 22-25 | 4 | 11,497 | Bob Veale | Rich Robertson | Bob Veale | Rich Robertson | Dave Giusti | 193 | 212 | -19 |
| 1970-05-30 | vs SFN | 48 | L 11-13 | 22-26 | 4 | 10,658 | Steve Blass | Mike McCormick | Ron Bryant | Steve Blass | Bill Faul | 204 | 225 | -21 |
| 1970-05-31 | vs SFN | 49 | W 7-3 | 23-26 | 3 | 9,515 | Bob Moose | Juan Marichal | Bob Moose | Juan Marichal | Dave Giusti | 211 | 228 | -17 |
| 1970-06-01 | vs SDN | 50 | W 5-1 | 24-26 | 3 | 5,036 | Dock Ellis | Danny Coombs | Dock Ellis | Danny Coombs | | 216 | 229 | -13 |
| 1970-06-02 | vs SDN | 51 | L 8-14 | 24-27 | 4 | 4,747 | Bob Veale | Gary Ross | Ron Herbel | Bob Veale | Tom Dukes | 224 | 243 | -19 |
| 1970-06-04 | vs LAN | 52 | L 0-5 | 24-28 | 4 | 5,423 | Steve Blass | Claude Osteen | Claude Osteen | Steve Blass | | 224 | 248 | -24 |
| 1970-06-05 | vs LAN | 53 | W 3-0 | 25-28 | 4 | 7,691 | Bob Moose | Joe Moeller | Bob Moose | Joe Moeller | | 227 | 248 | -21 |
| 1970-06-06 | vs LAN | 54 | W 7-6 | 26-28 | 2 | 13,153 | Dock Ellis | Don Sutton | Dave Giusti | Jose Pena | | 234 | 254 | -20 |
| 1970-06-07 | vs LAN | 55 | W 3-1 | 27-28 | 2 | 11,243 | Bob Veale | Alan Foster | Bob Veale | Alan Foster | | 237 | 255 | -18 |
| 1970-06-09 | @ SFN | 56 | W 5-1 | 28-28 | 2 | 4,250 | Steve Blass | Juan Marichal | Steve Blass | Juan Marichal | | 242 | 256 | -14 |
| 1970-06-10 | @ SFN | 57 | L 2-4 | 28-29 | 2 | 3,732 | Bob Moose | Gaylord Perry | Gaylord Perry | Bob Moose | | 244 | 260 | -16 |
| 1970-06-12 | @ SDN | 58 | W 2-0 | 29-30 | 2 | 0 | Dock Ellis | Dave Roberts | Dock Ellis | Dave Roberts | | 246 | 260 | -14 |
| 1970-06-12 | @ SDN | 59 | L 2-5 | 29-30 | 2 | 9,903 | Bob Veale | Danny Coombs | Danny Coombs | Bob Veale | | 248 | 265 | -17 |
| 1970-06-13 | @ SDN | 60 | W 7-2 | 30-30 | 3 | 7,105 | Steve Blass | Al Santorini | Steve Blass | Al Santorini | | 255 | 267 | -12 |
| 1970-06-14 | @ SDN | 61 | L 1-2 | 30-31 | 3 | 15,781 | Bob Moose | Clay Kirby | Clay Kirby | Bob Moose | | 256 | 269 | -13 |
| 1970-06-15 | @ LAN | 62 | W 5-2 | 31-31 | 3 | 14,490 | Jim Nelson | Joe Moeller | Jim Nelson | Joe Moeller | Dave Giusti | 261 | 271 | -10 |
| 1970-06-16 | @ LAN | 63 | L 0-1 | 31-32 | 3 | 20,069 | Bob Veale | Don Sutton | Don Sutton | Bob Veale | | 261 | 272 | -11 |
| 1970-06-17 | @ LAN | 64 | L 0-4 | 31-33 | 3 | 17,327 | Dock Ellis | Claude Osteen | Claude Osteen | Dock Ellis | | 261 | 276 | -15 |
| 1970-06-19 | vs MON | 65 | W 8-4 | 32-33 | 3 | 9,707 | Bob Moose | Dan McGinn | Bruce Dal Canton | Bill Dillman | Luke Walker | 269 | 280 | -11 |
| 1970-06-20 | vs MON | 66 | W 4-2 | 33-33 | 3 | 5,148 | Steve Blass | Carl Morton | Steve Blass | Carl Morton | Dave Giusti | 273 | 282 | -9 |
| 1970-06-21 | vs MON | 67 | L 2-3 | 33-34 | 3 | 12,325 | Bob Veale | Rich Nye | Rich Nye | Bob Veale | | 275 | 285 | -10 |
| 1970-06-22 | vs SLN | 68 | L 1-6 | 34-35 | 3 | 0 | Dock Ellis | Jerry Reuss | Jerry Reuss | Dock Ellis | | 276 | 291 | -15 |
| 1970-06-22 | vs SLN | 69 | W 1-0 | 34-35 | 3 | 15,158 | Jim Nelson | Mike Torrez | Jim Nelson | Frank Linzy | | 277 | 291 | -14 |
| 1970-06-23 | vs SLN | 70 | W 7-2 | 35-35 | 3 | 7,654 | Bob Moose | Chuck Taylor | Bob Moose | Chuck Taylor | | 284 | 293 | -9 |
| 1970-06-24 | vs SLN | 71 | W 4-3 | 36-35 | 3 | 8,095 | Steve Blass | Al Hrabosky | Luke Walker | Billy McCool | | 288 | 296 | -8 |
| 1970-06-25 | vs SLN | 72 | W 3-2 | 37-35 | 3 | 9,910 | Bob Veale | Steve Carlton | Dave Giusti | Steve Carlton | | 291 | 298 | -7 |
| 1970-06-27 | vs CHN | 73 | W 2-1 | 38-35 | 2 | 10,188 | Dock Ellis | Fergie Jenkins | Dock Ellis | Fergie Jenkins | | 293 | 299 | -6 |
| 1970-06-28 | vs CHN | 74 | W 3-2 | 40-35 | 2 | 0 | Bob Moose | Bill Hands | Dave Giusti | Bill Hands | Luke Walker | 296 | 301 | -5 |
| 1970-06-28 | vs CHN | 75 | W 4-1 | 40-35 | 2 | 40,918 | Jim Nelson | Milt Pappas | Jim Nelson | Milt Pappas | Dave Giusti | 300 | 302 | -2 |
| 1970-06-29 | @ NYN | 76 | L 2-3 | 40-36 | 2 | 42,416 | Steve Blass | Tom Seaver | Tom Seaver | Steve Blass | | 302 | 305 | -3 |
| 1970-06-30 | @ NYN | 77 | L 6-7 | 40-37 | 2 | 38,681 | Bob Veale | Jerry Koosman | Jerry Koosman | Bob Veale | Ron Taylor | 308 | 312 | -4 |
| 1970-07-01 | @ NYN | 78 | W 4-3 | 41-37 | 2 | 34,316 | Dock Ellis | Jim McAndrew | Dock Ellis | Jim McAndrew | Dave Giusti | 312 | 315 | -3 |
| 1970-07-03 | @ CHN | 79 | W 16-14 | 42-37 | 2 | 26,602 | Jim Nelson | Bill Hands | Dave Giusti | Phil Regan | | 328 | 329 | -1 |
| 1970-07-04 | @ CHN | 80 | W 10-6 | 43-38 | 2 | 0 | Steve Blass | Ken Holtzman | Steve Blass | Ken Holtzman | Luke Walker | 338 | 335 | 3 |
| 1970-07-04 | @ CHN | 81 | L 2-7 | 43-38 | 2 | 26,634 | Bob Veale | Milt Pappas | Milt Pappas | Bob Veale | Larry Gura | 340 | 342 | -2 |
| 1970-07-05 | @ CHN | 82 | W 5-2 | 44-38 | 2 | 25,569 | Dock Ellis | Fergie Jenkins | Dock Ellis | Fergie Jenkins | | 345 | 344 | 1 |
| 1970-07-06 | @ PHI | 83 | W 7-5 | 45-38 | 2 | 6,145 | Jim Nelson | Jim Bunning | Jim Nelson | Jim Bunning | Dave Giusti | 352 | 349 | 3 |
| 1970-07-07 | @ PHI | 84 | W 4-2 | 46-38 | 2 | 6,938 | Bob Veale | Chris Short | Bob Veale | Chris Short | Dave Giusti | 356 | 351 | 5 |
| 1970-07-08 | @ PHI | 85 | L 0-2 | 46-39 | 2 | 7,038 | Steve Blass | Rick Wise | Rick Wise | Steve Blass | | 356 | 353 | 3 |
| 1970-07-09 | @ SLN | 86 | W 6-0 | 47-39 | 2 | 22,345 | Dock Ellis | Steve Carlton | Dock Ellis | Steve Carlton | | 362 | 353 | 9 |
| 1970-07-10 | @ SLN | 87 | W 6-2 | 48-39 | 2 | 23,920 | Jim Nelson | Bob Gibson | Dave Giusti | Bob Gibson | | 368 | 355 | 13 |
| 1970-07-11 | @ SLN | 88 | W 8-7 | 49-39 | 1 | 25,686 | Bob Veale | Jerry Reuss | Bruce Dal Canton | Chuck Taylor | Orlando Pena | 376 | 362 | 14 |
| 1970-07-12 | @ SLN | 89 | W 7-6 | 50-39 | 1 | 45,776 | Steve Blass | Mike Torrez | Dave Giusti | Al Hrabosky | Bruce Dal Canton | 383 | 368 | 15 |
| 1970-07-16 | vs CIN | 90 | L 2-3 | 50-40 | 1 | 48,846 | Dock Ellis | Gary Nolan | Clay Carroll | Dock Ellis | | 385 | 371 | 14 |
| 1970-07-17 | vs CIN | 91 | W 4-3 | 51-40 | 1 | 23,298 | Jim Nelson | Wayne Simpson | Dave Giusti | Wayne Simpson | | 389 | 374 | 15 |
| 1970-07-18 | vs CIN | 92 | L 1-3 | 51-41 | 1 | 27,906 | Bob Veale | Jim Merritt | Jim Merritt | Dave Giusti | Wayne Granger | 390 | 377 | 13 |
| 1970-07-19 | vs CIN | 93 | W 7-3 | 52-41 | 1 | 32,294 | Luke Walker | Jim McGlothlin | Luke Walker | Don Gullett | Joe Gibbon | 397 | 380 | 17 |
| 1970-07-20 | @ HOU | 94 | L 4-5 | 52-42 | 1 | 17,934 | Dock Ellis | Denny Lemaster | Ron Cook | Bruce Dal Canton | | 401 | 385 | 16 |
| 1970-07-21 | @ HOU | 95 | L 1-3 | 52-43 | 1 | 17,741 | Jim Nelson | Don Wilson | Don Wilson | Jim Nelson | Ron Cook | 402 | 388 | 14 |
| 1970-07-22 | vs ATL | 96 | W 5-3 | 53-43 | 1 | 19,145 | Bruce Dal Canton | George Stone | Bruce Dal Canton | George Stone | Dave Giusti | 407 | 391 | 16 |
| 1970-07-23 | vs ATL | 97 | W 6-5 | 54-43 | 1 | 14,377 | Luke Walker | Jim Nash | Dick Colpaert | Mike McQueen | Dave Giusti | 413 | 396 | 17 |
| 1970-07-24 | vs HOU | 98 | W 11-0 | 55-43 | 1 | 43,290 | Dock Ellis | Tom Griffin | Dock Ellis | Tom Griffin | | 424 | 396 | 28 |
| 1970-07-25 | vs HOU | 99 | L 4-8 | 55-44 | 1 | 14,069 | Bob Veale | Ron Cook | Ron Cook | Bob Veale | Larry Dierker | 428 | 404 | 24 |
| 1970-07-26 | vs HOU | 100 | L 4-6 | 55-45 | 1 | 40,131 | Jim Nelson | Don Wilson | Denny Lemaster | Dave Giusti | Fred Gladding | 432 | 410 | 22 |
| 1970-07-28 | @ CIN | 101 | W 4-3 | 56-45 | 1 | 25,807 | Bruce Dal Canton | Jim McGlothlin | Bruce Dal Canton | Jim McGlothlin | Dave Giusti | 436 | 413 | 23 |
| 1970-07-29 | @ CIN | 102 | L 3-4 | 56-46 | 1 | 25,788 | Dock Ellis | Gary Nolan | Gary Nolan | Dock Ellis | Wayne Granger | 439 | 417 | 22 |
| 1970-07-30 | @ CIN | 103 | L 4-8 | 56-47 | 1 | 26,298 | Bob Veale | Tony Cloninger | Tony Cloninger | Bob Veale | Don Gullett | 443 | 425 | 18 |
| 1970-07-31 | @ ATL | 104 | L 3-4 | 56-48 | 2 | 12,196 | Jim Nelson | Pat Jarvis | Pat Jarvis | Jim Nelson | Hoyt Wilhelm | 446 | 429 | 17 |
| 1970-08-01 | @ ATL | 105 | W 20-10 | 57-48 | 2 | 28,333 | Bruce Dal Canton | George Stone | Orlando Pena | George Stone | Dave Giusti | 466 | 439 | 27 |
| 1970-08-02 | @ ATL | 106 | W 10-7 | 58-48 | 1 | 15,227 | Dock Ellis | Jim Nash | Dock Ellis | Jim Nash | Dave Giusti | 476 | 446 | 30 |
| 1970-08-03 | @ MON | 107 | L 0-8 | 58-49 | 1 | 18,110 | Bob Moose | Dan McGinn | Dan McGinn | Bob Moose | | 476 | 454 | 22 |
| 1970-08-04 | @ MON | 108 | W 4-2 | 59-49 | 1 | 27,112 | Bob Veale | Mike Marshall | Bob Veale | Mike Marshall | | 480 | 456 | 24 |
| 1970-08-05 | vs PHI | 109 | W 4-0 | 60-49 | 1 | 12,915 | Luke Walker | Rick Wise | Luke Walker | Rick Wise | | 484 | 456 | 28 |
| 1970-08-06 | vs PHI | 110 | W 4-0 | 62-49 | 1 | 0 | Dock Ellis | Jim Bunning | Dock Ellis | Jim Bunning | | 488 | 456 | 32 |
| 1970-08-06 | vs PHI | 111 | W 8-3 | 62-49 | 1 | 26,664 | Bruce Dal Canton | Bill Champion | Bruce Dal Canton | Bill Champion | | 496 | 459 | 37 |
| 1970-08-07 | vs NYN | 112 | W 6-1 | 63-49 | 1 | 37,556 | Bob Moose | Jim McAndrew | Bob Moose | Jim McAndrew | | 502 | 460 | 42 |
| 1970-08-08 | vs NYN | 113 | L 9-12 | 63-50 | 1 | 27,843 | Bob Veale | Jerry Koosman | Jerry Koosman | Bob Veale | Gary Gentry | 511 | 472 | 39 |
| 1970-08-09 | vs NYN | 114 | W 8-3 | 64-50 | 1 | 41,772 | Luke Walker | Nolan Ryan | Luke Walker | Nolan Ryan | Orlando Pena | 519 | 475 | 44 |
| 1970-08-10 | vs NYN | 115 | L 2-10 | 64-51 | 1 | 47,148 | Dock Ellis | Tom Seaver | Tom Seaver | Dock Ellis | | 521 | 485 | 36 |
| 1970-08-11 | vs LAN | 116 | L 4-5 | 64-52 | 1 | 16,708 | Bruce Dal Canton | Claude Osteen | Claude Osteen | Bruce Dal Canton | Jim Brewer | 525 | 490 | 35 |
| 1970-08-12 | vs LAN | 117 | L 4-11 | 64-53 | 1 | 34,551 | Bob Moose | Bill Singer | Pete Mikkelsen | Bob Moose | Charlie Hough | 529 | 501 | 28 |
| 1970-08-14 | vs SDN | 118 | W 2-1 | 66-53 | 1 | 0 | Steve Blass | Dave Roberts | Orlando Pena | Dave Roberts | | 531 | 502 | 29 |
| 1970-08-14 | vs SDN | 119 | W 10-1 | 66-53 | 1 | 26,979 | Luke Walker | Pat Dobson | Luke Walker | Pat Dobson | | 541 | 503 | 38 |
| 1970-08-15 | vs SDN | 120 | W 9-3 | 67-53 | 1 | 14,110 | Bob Veale | Earl Wilson | Bob Veale | Earl Wilson | | 550 | 506 | 44 |
| 1970-08-16 | vs SDN | 121 | L 6-8 | 67-54 | 1 | 18,969 | Bruce Dal Canton | Danny Coombs | Ron Herbel | Orlando Pena | Tom Dukes | 556 | 514 | 42 |
| 1970-08-17 | vs SFN | 122 | L 4-5 | 67-55 | 1 | 21,148 | Bob Moose | Gaylord Perry | Gaylord Perry | Bruce Dal Canton | | 560 | 519 | 41 |
| 1970-08-18 | vs SFN | 123 | W 6-2 | 68-55 | 1 | 25,325 | Steve Blass | Skip Pitlock | Steve Blass | Skip Pitlock | Dave Giusti | 566 | 521 | 45 |
| 1970-08-19 | vs SFN | 124 | L 4-7 | 68-56 | 1 | 24,655 | Luke Walker | Juan Marichal | Juan Marichal | Luke Walker | | 570 | 528 | 42 |
| 1970-08-21 | @ LAN | 125 | L 1-2 | 68-57 | 1 | 24,372 | Bob Veale | Claude Osteen | Claude Osteen | Bob Veale | | 571 | 530 | 41 |
| 1970-08-22 | @ LAN | 126 | W 2-1 | 69-57 | 1 | 39,829 | Bob Moose | Don Sutton | Bruce Dal Canton | Pete Mikkelsen | | 573 | 531 | 42 |
| 1970-08-23 | @ LAN | 127 | W 11-0 | 70-57 | 1 | 20,678 | Steve Blass | Alan Foster | Steve Blass | Alan Foster | | 584 | 531 | 53 |
| 1970-08-25 | @ SDN | 128 | L 3-4 | 70-58 | 1 | 4,876 | Luke Walker | Dave Roberts | Tom Dukes | Luke Walker | | 587 | 535 | 52 |
| 1970-08-26 | @ SDN | 129 | L 1-2 | 70-59 | 1 | 6,067 | Fred Cambria | Pat Dobson | Pat Dobson | Fred Cambria | Tom Dukes | 588 | 537 | 51 |
| 1970-08-28 | @ SFN | 130 | L 1-5 | 70-60 | 1 | 6,174 | Bob Moose | Juan Marichal | Juan Marichal | Bob Moose | | 589 | 542 | 47 |
| 1970-08-29 | @ SFN | 131 | L 9-10 | 70-61 | 1 | 8,188 | Steve Blass | Skip Pitlock | Don McMahon | Bruce Dal Canton | | 598 | 552 | 46 |
| 1970-08-30 | @ SFN | 132 | L 3-7 | 70-63 | 1 | 0 | Luke Walker | Frank Reberger | Jerry Johnson | Luke Walker | Rich Robertson | 601 | 559 | 42 |
| 1970-08-30 | @ SFN | 133 | L 1-2 | 70-63 | 1 | 15,963 | Fred Cambria | Ron Bryant | Ron Bryant | Dave Giusti | | 602 | 561 | 41 |
| 1970-09-01 | @ MON | 134 | W 8-4 | 71-63 | 1 | 20,123 | Bob Veale | Bill Stoneman | Bob Veale | Bill Stoneman | Dave Giusti | 610 | 565 | 45 |
| 1970-09-02 | @ MON | 135 | L 7-10 | 71-64 | 1 | 15,461 | Bob Moose | Carl Morton | Mike Marshall | Joe Gibbon | | 617 | 575 | 42 |
| 1970-09-04 | vs PHI | 136 | W 4-3 | 72-64 | 1 | 22,547 | Steve Blass | Rick Wise | Steve Blass | Rick Wise | John Lamb | 621 | 578 | 43 |
| 1970-09-05 | vs PHI | 137 | W 6-4 | 73-64 | 1 | 22,925 | Fred Cambria | Barry Lersch | Fred Cambria | Barry Lersch | Dave Giusti | 627 | 582 | 45 |
| 1970-09-06 | vs PHI | 138 | W 4-3 | 74-64 | 1 | 19,049 | Luke Walker | Jim Bunning | Luke Walker | Dick Selma | | 631 | 585 | 46 |
| 1970-09-07 | vs CHN | 139 | W 8-3 | 75-65 | 1 | 0 | Bob Moose | Milt Pappas | Bob Moose | Milt Pappas | | 639 | 588 | 51 |
| 1970-09-07 | vs CHN | 140 | L 2-9 | 75-65 | 1 | 42,556 | Bob Veale | Fergie Jenkins | Fergie Jenkins | Bob Veale | | 641 | 597 | 44 |
| 1970-09-08 | vs CHN | 141 | L 3-10 | 75-66 | 1 | 6,777 | Steve Blass | Bill Hands | Bill Hands | Steve Blass | | 644 | 607 | 37 |
| 1970-09-09 | vs SLN | 142 | L 4-6 | 75-67 | 2 | 14,927 | Fred Cambria | Frank Bertaina | Frank Bertaina | Fred Cambria | Tom Hilgendorf | 648 | 613 | 35 |
| 1970-09-10 | vs SLN | 143 | W 2-0 | 76-67 | 2 | 14,386 | Luke Walker | Nelson Briles | Luke Walker | Nelson Briles | | 650 | 613 | 37 |
| 1970-09-12 | @ CHN | 144 | W 5-4 | 77-67 | 1 | 33,199 | Bob Moose | Fergie Jenkins | Bob Moose | Fergie Jenkins | Dave Giusti | 655 | 617 | 38 |
| 1970-09-13 | @ CHN | 145 | L 2-3 | 77-68 | 1 | 22,567 | Steve Blass | Bill Hands | Bill Hands | Steve Blass | | 657 | 620 | 37 |
| 1970-09-15 | @ PHI | 146 | W 8-3 | 78-68 | 1 | 4,802 | Luke Walker | Barry Lersch | Luke Walker | Barry Lersch | Dave Giusti | 665 | 623 | 42 |
| 1970-09-16 | @ PHI | 147 | W 5-3 | 79-68 | 1 | 4,418 | Bob Moose | Jim Bunning | Bob Moose | Jim Bunning | John Lamb | 670 | 626 | 44 |
| 1970-09-17 | @ PHI | 148 | L 2-3 | 79-69 | 1 | 4,199 | Dock Ellis | Chris Short | Chris Short | John Lamb | Dick Selma | 672 | 629 | 43 |
| 1970-09-18 | @ NYN | 149 | W 3-2 | 80-69 | 1 | 42,225 | Steve Blass | Jim McAndrew | Steve Blass | Jim McAndrew | Dave Giusti | 675 | 631 | 44 |
| 1970-09-19 | @ NYN | 150 | W 2-1 | 81-69 | 1 | 41,323 | Luke Walker | Gary Gentry | Luke Walker | Gary Gentry | Joe Gibbon | 677 | 632 | 45 |
| 1970-09-20 | @ NYN | 151 | L 1-4 | 82-70 | 1 | 0 | Bob Moose | Jerry Koosman | Jerry Koosman | Bob Moose | | 678 | 636 | 42 |
| 1970-09-20 | @ NYN | 152 | W 9-5 | 82-70 | 1 | 54,806 | Fred Cambria | Tom Seaver | Dave Giusti | Tug McGraw | | 687 | 641 | 46 |
| 1970-09-22 | vs MON | 153 | L 0-1 | 83-71 | 1 | 0 | Dock Ellis | Bill Stoneman | Bill Stoneman | Dock Ellis | | 687 | 642 | 45 |
| 1970-09-22 | vs MON | 154 | W 3-1 | 83-71 | 1 | 19,524 | Bob Veale | Mike Wegener | Bob Veale | Mike Wegener | Joe Gibbon | 690 | 643 | 47 |
| 1970-09-23 | vs MON | 155 | L 2-3 | 83-72 | 1 | 12,420 | George Brunet | Carl Morton | Carl Morton | George Brunet | Mike Marshall | 692 | 646 | 46 |
| 1970-09-24 | vs MON | 156 | W 8-0 | 84-72 | 1 | 14,026 | Luke Walker | Steve Renko | Luke Walker | Steve Renko | | 700 | 646 | 54 |
| 1970-09-25 | vs NYN | 157 | W 4-3 | 85-72 | 1 | 41,484 | Bob Moose | Jerry Koosman | Mudcat Grant | Dean Chance | Joe Gibbon | 704 | 649 | 55 |
| 1970-09-26 | vs NYN | 158 | W 4-3 | 86-72 | 1 | 34,311 | Steve Blass | Tom Seaver | Mudcat Grant | Ron Herbel | | 708 | 652 | 56 |
| 1970-09-27 | vs NYN | 159 | W 2-1 | 87-72 | 1 | 50,469 | Dock Ellis | Jim McAndrew | Dock Ellis | Jim McAndrew | Dave Giusti | 710 | 653 | 57 |
| 1970-09-29 | @ SLN | 160 | W 7-2 | 88-72 | 1 | 13,232 | Luke Walker | Bob Gibson | Bruce Dal Canton | Bob Gibson | John Lamb | 717 | 655 | 62 |
| 1970-09-30 | @ SLN | 161 | L 3-4 | 88-73 | 1 | 8,084 | Bob Veale | Jerry Reuss | Nelson Briles | Mudcat Grant | | 720 | 659 | 61 |
| 1970-10-01 | @ SLN | 162 | W 9-5 | 89-73 | 1 | 8,457 | Steve Blass | Harry Parker | George Brunet | Reggie Cleveland | Ed Acosta | 729 | 664 | 65 |