| Month | Game | Strat Date | + | Away | Pitcher | Balance | At | Home | Pitcher | Balance |
| August | 1 | 8/14/2021 | GGG | John Gant | E | At | CUB | Alek Manoah | 6R | |
| August | 2 | 8/15/2021 | GGG | Garrett Richards | 5L | At | CUB | Joe Ross | 5R | |
| August | 3 | 8/16/2021 | GGG | Nick Pivetta | E | At | CUB | Casey Mize | 8R | |
| August | 4 | 8/17/2021 | CUB | Jon Gray | 2L | At | AAR | Mike Foltynewicz | 2R | |
| August | 5 | 8/18/2021 | CUB | Zach Plesac | 4L | At | AAR | J.A. Happ* | 5L | |
| August | 6 | 8/19/2021 | CUB | Alek Manoah | 6R | At | AAR | Tylor Megill | 9R | |
| August | OFF | 8/20/2021 | ||||||||
| August | 7 | 8/21/2021 | + | CUB | Joe Ross | 5R | At | CWC | Shane McClanahan* | 3R |
| August | 8 | 8/22/2021 | + | CUB | Casey Mize | 8R | At | CWC | Jose Urena | 6R |
| August | 9 | 8/23/2021 | + | CUB | Jon Gray | 2L | At | CWC | Johnny Cueto | E |
| August | 10 | 8/24/2021 | + | CUB | Zach Plesac | 4L | At | CWC | Jose Berrios | 7R |
| August | 11 | 8/25/2021 | + | CUB | Alek Manoah | 6R | At | CWC | German Marquez | 3R |
| August | 12 | 8/26/2021 | + | DUB | Zach Davies | 3L | At | CUB | Joe Ross | 5R |
| August | 13 | 8/27/2021 | + | DUB | Michael Wacha | 4L | At | CUB | Casey Mize | 8R |
| August | 14 | 8/28/2021 | + | DUB | Caleb Smith* | 5R | At | CUB | Jon Gray | 2L |
| August | 15 | 8/29/2021 | + | DUB | Rich Hill* | 5L | At | CUB | Zach Plesac | 4L |
| August | OFF | 8/30/2021 | ||||||||
| August | 16 | 8/31/2021 | + | CRC | Hyun-Jin Ryu* | E | At | CUB | Alek Manoah | 6R |
| August | 17 | 9/1/2021 | + | CRC | Kevin Gausman | E | At | CUB | Joe Ross | 5R |
| August | 18 | 9/2/2021 | + | CRC | Triston McKenzie | 1L | At | CUB | Casey Mize | 8R |
| August | 19 | 9/3/2021 | + | CRC | Sonny Gray | 1L | At | CUB | Jon Gray | 2L |
| August | 20 | 9/4/2021 | + | CRC | Jake Odorizzi | 1R | At | CUB | Zach Plesac | 4L |
| August | 21 | 9/5/2021 | + | CUB | Alek Manoah | 6R | At | DUB | Rich Hill* | 5L |
| August | 22 | 9/6/2021 | + | CUB | Joe Ross | 5R | At | DUB | Dane Dunning | E |
| August | 23 | 9/7/2021 | + | CUB | Casey Mize | 8R | At | DUB | Madison Bumgarner* | 2L |
| August | 24 | 9/8/2021 | + | CUB | Jon Gray | 2L | At | DUB | Zach Davies | 3L |
| + Indicates In Division Game | ||||||||||