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| Progressive Losses 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 | L | Single-Season | L | Active | L | Yearly | L |
| 1884 | Bobby Mitchell | 28 | Bobby Mitchell | 28 | Bobby Mitchell | 28 | Bobby Mitchell | 28 |
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