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| Progressive OSLG 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 | OSLG | Single-Season | OSLG | Active | OSLG | Yearly | OSLG |
| 1947 | Stan Lugo | .2511 | Stan Lugo | .2511 | ||||
| 1948 | Stan Lugo | .2281 | Stan Lugo | .2281 | ||||
| 1949 | Stan Lugo | .2281 | Stan Lugo | .2904 | ||||
| 1950 | Robert Lerman | .3167 | Stan Lugo | .2281 | Robert Lerman | .3167 | Robert Lerman | .2795 |
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