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| Progressive Strikeouts 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 | K | Single-Season | K | Active | K | Yearly | K |
| 1884 | Frank Fennelly | 184 | Frank Fennelly | 184 | Frank Fennelly | 184 | Frank Fennelly | 184 |
| For questions or to report errors, please send us a note. |