Single-Season Leaders for Innings Pitched
Minimum of 3.1 PA/G, 1.0 IP/G, and 0.1 decision/G for single-season leaderboards for rate statistics.
| Rank | Player | Innings | Year |
| 1. | Felix Hernandez | 140.7 | 2011 |
| 2. | Justin Verlander | 134.7 | 2012 |
| 3. | Randy Johnson | 132.0 | 2005 |
| 3. | Dan Haren | 132.0 | 2012 |
| 5. | Justin Verlander | 131.3 | 2013 |
