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| Progressive Winning Pct 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 | WPct | Single-Season | WPct | Active | WPct | Yearly | WPct |
| 1947 | Stan Lugo | .8519 | Stan Lugo | .8519 | ||||
| 1948 | Stan Lugo | .8846 | Stan Lugo | .8846 | ||||
| 1949 | Stan Lugo | .8846 | Stan Lugo | .8519 | ||||
| 1950 | Robert Lerman | .6696 | Stan Lugo | .8846 | Robert Lerman | .6696 | Terry Lobdell | .8182 |
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