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| Progressive Strikeouts 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 | K9 | Single-Season | K9 | Active | K9 | Yearly | K9 |
| 1947 | Stan Lugo | 10.68 | Stan Lugo | 10.68 | ||||
| 1948 | Stan Lugo | 11.53 | Stan Lugo | 11.53 | ||||
| 1949 | Stan Lugo | 11.53 | Stan Lugo | 11.46 | ||||
| 1950 | Robert Lerman | 8.88 | Stan Lugo | 11.53 | Robert Lerman | 8.88 | Jarvis Inabinet | 10.32 |
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