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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 |
| 1947 | Celso Ocejo | 21 | Celso Ocejo | 21 | Celso Ocejo | 21 | Celso Ocejo | 21 |
| 1948 | Celso Ocejo | 39 |
Carlos Camuņas Roderick Mooney Celso Ocejo |
21 | Celso Ocejo | 39 |
Carlos Camuņas Roderick Mooney |
21 |
| 1949 | Celso Ocejo | 55 |
Carlos Camuņas Roderick Mooney Celso Ocejo |
21 | Celso Ocejo | 55 |
Jesse Nelson Edward Plaisance |
20 |
| 1950 | Daniel Elliott | 80 | Daniel Elliott | 26 | Daniel Elliott | 80 | Daniel Elliott | 26 |
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