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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Joel Atkinson | 1.07 | 2012-2021 | |
| 2 | Phil Goodman | 1.10 | 2013-2018 | |
| 3 | Sergio Hernandez | 1.11 | 2001-2013 | |
| 4 | Kyle Chamberlin | 1.13 | 2013-2021 | |
| 4 | Jesus Garcia# | 1.13 | 2018-2024 | |
| 6 | Leo Medina | 1.15 | 2000-2009 | |
| 7 | Josh Graham | 1.16 | 2014-2018 | |
| 8 | Josh Hoffman | 1.19 | 2010-2014 | |
| 9 | Danny Justice | 1.20 | 2000-2010 | |
| 9 | Gil Johnson | 1.20 | 2000-2010 | |
| 11 | Casey Levy# | 1.23 | 2018-2024 | |
| 12 | Devin Nisbet | 1.26 | 2001-2013 | |
| 13 | Ryan Iverson | 1.36 | 2001-2007 | |
| 13 | Enrique Perez | 1.36 | 2007-2023 | |
| 15 | Mike Palmer | 1.37 | 2000-2010 | |
| 16 | Brian O'Connor | 1.38 | 2000-2006 | |
| 17 | Tony Hernandez | 1.40 | 2000-2010 | |
| 18 | Brendan Rees | 1.43 | 2001-2010 | |
| 19 | Jaden Taylor | 1.46 | 2005-2013 | |
| 20 | Guo Liu | 1.48 | 2003-2010 | |
| 21 | Jose Rios | 1.51 | 2007-2016 |
