| Month | Game | Strat Date | + | Away | Pitcher | Balance | At | Home | Pitcher | Balance |
| September | 1 | 9/9/2018 | CUB | Pablo Lopez | 6R | At | OAK | Dylan Cease | 4R | |
| September | 2 | 9/10/2018 | CUB | Caleb Smith* | 4L | At | OAK | Merrill Kelly | 1L | |
| September | 3 | 9/11/2018 | CUB | Kyle Hendricks | 2L | At | OAK | Eduardo Rodriguez* | 3R | |
| September | 4 | 9/12/2018 | OAK | Matt Boyd* | 1L | At | CHI | Jesse Chavez | 4L | |
| September | 5 | 9/13/2018 | OAK | Anthony Desclafani | 3R | At | CHI | Jordan Lyles | 6R | |
| September | 6 | 9/14/2018 | OAK | Brad Keller | E | At | CHI | Robbie Ray* | 3L | |
| September | OFF | 9/15/2018 | ||||||||
| September | 7 | 9/16/2018 | + | HOH | Brad Peacock | 9R | At | OAK | Dylan Cease | 4R |
| September | 8 | 9/17/2018 | + | HOH | Diego Castillo | 5R | At | OAK | Merrill Kelly | 1L |
| September | 9 | 9/18/2018 | + | HOH | Zach Davies | E | At | OAK | Eduardo Rodriguez* | 3R |
| September | 10 | 9/19/2018 | + | HOH | Andrew Cashner | 5L | At | OAK | Matt Boyd* | 1L |
| September | 11 | 9/20/2018 | + | HOH | Jason Vargas* | 1R | At | OAK | Anthony Desclafani | 3R |
| September | 12 | 9/21/2018 | + | OAK | Brad Keller | E | At | HMA | Sandy Alcantara | 2R |
| September | 13 | 9/22/2018 | + | OAK | Dylan Cease | 4R | At | HMA | Lance Lynn | 2R |
| September | 14 | 9/23/2018 | + | OAK | Merrill Kelly | 1L | At | HMA | Mike Soroka | 5R |
| September | 15 | 9/24/2018 | + | OAK | Eduardo Rodriguez* | 3R | At | HMA | Steven Brault* | 2L |
| September | OFF | 9/25/2018 | ||||||||
| September | 16 | 9/26/2018 | + | AAR | Jacob Degrom | 1R | At | OAK | Matt Boyd* | 1L |
| September | 17 | 9/27/2018 | + | AAR | Noah Syndergaard | 1R | At | OAK | Anthony Desclafani | 3R |
| September | 18 | 9/28/2018 | + | AAR | Cal Quantrill | 7R | At | OAK | Brad Keller | E |
| September | 19 | 9/29/2018 | + | AAR | Adam Wainwright | 4R | At | OAK | Dylan Cease | 4R |
| September | 20 | 9/30/2018 | + | AAR | Jacob Degrom | 1R | At | OAK | Merrill Kelly | 1L |
| September | 21 | 10/1/2018 | + | OAK | Eduardo Rodriguez* | 3R | At | NYY | Mike Fiers | 1L |
| September | 22 | 10/2/2018 | + | OAK | Matt Boyd* | 1L | At | NYY | Matt Shoemaker | 2R |
| September | 23 | 10/3/2018 | + | OAK | Anthony Desclafani | 3R | At | NYY | Luis Castillo | 1R |
| September | 24 | 10/4/2018 | + | OAK | Brad Keller | E | At | NYY | Lucas Giolito | 4L |
| + Indicates In Division Game | ||||||||||