Hello everybody. The last time I published a starting pitcher power rankings post was August 4th, so it’s been quite a while. Blame the combination of my computer struggling and my semester beginning for that. With these rankings having gone unpublished for about two months, obviously, there has been a lot of movement within the list. To that end, I will include each pitcher’s ranking from the early-August article for comparison. As a reminder, these power rankings are based upon a pitcher’s statistics from just 2021, and they are not predictive. This is a formulaic measure of how a pitcher has performed, not how well they will perform.
Author’s Note: All stats are prior to play on Friday, September 17
| Rank | Name | Score | Aug. 4 |
| 1 | Corbin Burnes | 65.2 | 3 (▲2) |
| 2 | Zack Wheeler | 59.9 | 2 (▲/▼0) |
| 3 | Gerrit Cole | 53.6 | 5 (▲2) |
| 4 | Max Scherzer | 53.1 | 16 (▲12) |
| 5 | Walker Buehler | 50.2 | 6 (▲1) |
| 6 | Brandon Woodruff | 48.8 | 4 (▼2) |
| 7 | Robbie Ray | 48.1 | 20 (▲13) |
| 8 | Kevin Gausman | 47.1 | 7 (▼1) |
| 9 | Jacob deGrom | 47.1 | 1 (▼8) |
| 10 | Nathan Eovaldi | 42.9 | 13 (▲3) |
| 11 | Sandy Alcantara | 41.7 | 29 (▲18) |
| 12 | Adam Wainwright | 41.3 | 36 (▲24) |
| 13 | Charlie Morton | 41.1 | 25 (▲12) |
| 14 | Carlos Rodón | 40.9 | 8 (▼6) |
| 15 | Julio Urías | 40.8 | 22 (▲7) |
| 16 | Freddy Peralta | 37.8 | 9 (▼7) |
| 17 | Lance Lynn | 37.1 | 12 (▼5) |
| 18 | Marcus Stroman | 36.8 | 30 (▲12) |
| 19 | Logan Webb | 35.3 | NR (DNQ*) |
| 20 | Joe Musgrove | 34.9 | 18 (▼2) |
| 21 | Germán Márquez | 34.2 | 10 (▼11) |
| 22 | José Berríos | 33.8 | 27 (▲5) |
| 23 | Lance McCullers Jr. | 33.4 | 32 (▲9) |
| 24 | Lucas Giolito | 33.3 | 21 (▼3) |
| 25 | Aaron Nola | 33.1 | 28 (▲3) |
| 26 | Chris Bassitt | 32.5 | 19 (▼7) |
| 27 | Trevor Rogers | 31.9 | 11 (▼16) |
| 28 | Tyler Mahle | 31.8 | 39 (▲11) |
| 29 | Frankie Montas | 31.6 | 41 (▲12) |
| 30 | Clayton Kershaw | 30.4 | 15 (▼15) |
