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| Progressive Innings Pitched Leaderboard | |
| This table is a snapshot of the career, single-season, active, and yearly leaders at the end of each season. | |
| * - Indicates Hall of Fame
Bold - Indicates active player |
| Year | Career | IP | Single-Season | IP | Active | IP | Yearly | IP |
| 1884 | Dupee Shaw | 393.7 | Dupee Shaw | 393.7 | Dupee Shaw | 393.7 | Dupee Shaw | 393.7 |
| For questions or to report errors, please send us a note. |