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| Progressive Hits per 9IP 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 | H9 | Single-Season | H9 | Active | H9 | Yearly | H9 |
| 1952 | Justin Paige | 5.90 | Justin Paige | 5.90 | ||||
| 1953 | Justin Paige | 5.90 | Jason Williams | 6.90 | ||||
| 1954 | Michael Knepper | 7.95 | Justin Paige | 5.90 | Michael Knepper | 7.95 | David Caviness | 7.12 |
| 1955 | Donald Phillips | 7.36 | Justin Paige | 5.90 | Donald Phillips | 7.36 | John Alton | 5.91 |
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