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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Reginald Dyer* | 0.79 | 2016-2031 | |
| 1 | José Vargas | 0.79 | 2036-2049 | |
| 3 | Felipe González# | 0.91 | 2048-2049 | |
| 4 | Joe Hunt | 0.99 | 2026-2034 | |
| 5 | Tom Bancroft# | 1.00 | 2044-2050 | |
| 5 | Ernesto Garza | 1.00 | 2044-2049 | |
| 7 | Robert Collard | 1.02 | 2030-2046 | |
| 8 | Clive Smedley | 1.04 | 2026-2039 | |
| 9 | Chandler Burns | 1.05 | 2024-2036 | |
| 10 | Jorge Mendoza | 1.08 | 2038-2044 | |
| 11 | Stan Long | 1.12 | 2025-2030 | |
| 12 | Matt Carter | 1.15 | 2013-2019 | |
| 13 | Mauro Olivas | 1.17 | 2013-2017 | |
| 14 | Ernest Nelson | 1.20 | 2019-2034 | |
| 15 | Clark Crawford | 1.21 | 2030-2038 | |
| 16 | Huang-di Ning# | 1.26 | 2042-2044 | |
| 16 | Desi Bradley | 1.26 | 2021-2026 | |
| 18 | Ricardo Tobías | 1.31 | 2014-2018 | |
| 19 | Mark Clark | 1.32 | 2030-2048 | |
| 20 | James Martin | 1.33 | 2038-2046 | |
| 20 | Kian Hayward# | 1.33 | 2047-2049 | |
| 22 | Woodrow McKay | 1.36 | 2042-2049 | |
| 23 | Toshikazu Higashi | 1.38 | 2021-2029 | |
| 24 | Bobby Sanders | 1.40 | 2028-2042 | |
| 25 | Henry Valentine | 1.41 | 2021-2031 | |
| 26 | Willis Hines | 1.44 | 2029-2037 |
