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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Ramón Silva | 1.272 | 2051 | |
| 2 | Joe Willis | 1.528 | 2007 | |
| 3 | Harry Edwards | 1.551 | 2012 | |
| 4 | Willie Robison | 1.631 | 2006 | |
| 5 | Jim Thomas | 1.665 | 2010 | |
| 6 | Gallin Rieff | 1.809 | 2049 | |
| 7 | Bryan Banks | 1.828 | 2000 | |
| 8 | Stewart Taylor | 1.832 | 1990 | |
| 9 | António Arteaga | 1.834 | 1990 | |
| 10 | Denny Stewart | 1.862 | 2014 | |
| 11 | Vance Dowling | 1.872 | 2010 | |
| 12 | Nick Tamulevich# | 1.873 | 2071 | |
| 13 | Paul Graham | 1.881 | 2052 | |
| 14 | Dan Burford | 1.897 | 2037 | |
| 15 | Joe Rivers | 1.898 | 2012 | |
| 16 | Graham Christensen | 1.932 | 2000 | |
| 17 | Ernie Stone | 1.938 | 2059 | |
| 18 | Darren Pace | 1.948 | 2020 | |
| 19 | Anderson Wyatt | 1.949 | 2025 | |
| 20 | Sean Johnstone | 1.974 | 2048 | |
| 21 | Ivan Lyadin | 1.976 | 2047 | |
| 22 | Jeffrey Petipas | 2.003 | 2045 | |
| 23 | William Brandt | 2.031 | 2014 | |
| 24 | Alex Arias# | 2.033 | 2069 | |
| 25 | Dave Callahan | 2.043 | 2047 | |
| 26 | Juan Cardenas | 2.047 | 2001 | |
| 27 | Jari Roks | 2.051 | 2057 | |
| 28 | Juan Ramirez# | 2.060 | 2073 | |
| 29 | Julian Braber | 2.066 | 2046 | |
| 29 | Zhao-ying Ta | 2.066 | 2014 | |
| 31 | Tony Casillas | 2.067 | 2024 | |
| 32 | Luis Morín | 2.074 | 2008 | |
| 33 | Alberto Zamora# | 2.077 | 2073 | |
| 33 | Steve Rodríguez | 2.077 | 1990 | |
| 35 | Jason MacGruder | 2.088 | 2001 | |
| 36 | Shao-zu An# | 2.090 | 2074 | |
| 37 | Peter Monck | 2.092 | 2054 | |
| 38 | Lawrence Moran | 2.101 | 2013 | |
| 39 | Juan Valdéz | 2.102 | 1999 | |
| 40 | Roland Mercer | 2.104 | 2010 | |
| 41 | Tom Cross | 2.106 | 2014 | |
| 42 | Vidal Martínez | 2.122 | 2005 | |
| 43 | Jordan Viera# | 2.128 | 2075 | |
| 44 | Irakly Alvarez# | 2.133 | 2074 | |
| 45 | Pedro Rivera | 2.144 | 2049 | |
| 46 | Henry Bader | 2.146 | 2002 | |
| 47 | Leonard Clark | 2.153 | 1993 | |
| 48 | Luther Edgar | 2.157 | 2007 | |
| 49 | Craig Walker | 2.162 | 1997 | |
| 49 | David Hopper | 2.162 | 2029 | |
| 51 | Travis Templeman | 2.167 | 2041 | |
| 52 | António Soriano | 2.171 | 2003 | |
| 53 | Ben Henson | 2.176 | 2011 | |
| 53 | Olber Ajete# | 2.176 | 2067 | |
| 55 | Shawn Foley | 2.181 | 2057 | |
| 56 | Stewart Wilson | 2.182 | 2011 | |
| 57 | José Mora | 2.196 | 1998 | |
| 58 | Don Pretty# | 2.198 | 2073 | |
| 59 | Jermaine Clayton | 2.199 | 2011 | |
| 60 | Eric Briggs | 2.200 | 1991 | |
| 61 | Dennis Jackson | 2.210 | 1996 | |
| 62 | Cesar Rios | 2.213 | 2062 | |
| 63 | Boyd Burnett | 2.222 | 2001 | |
| 64 | Michael Wood | 2.226 | 1994 | |
| 65 | Mushanokoji Kubo | 2.230 | 2058 | |
| 66 | J.J. Alexander | 2.234 | 1995 | |
| 67 | Tristan Phillips | 2.239 | 1997 | |
| 68 | Earl O'Brien | 2.246 | 1995 | |
| 69 | Les Saunders | 2.250 | 1991 | |
| 69 | Jamie Guillot | 2.250 | 2021 | |
| 69 | James Barry | 2.250 | 2002 | |
| 69 | Axel Maisonneuve# | 2.250 | 2075 | |
| 73 | Jimmy Miller | 2.254 | 1992 | |
| 73 | Julian Phillips | 2.254 | 2004 | |
| 73 | Kenny Bradley | 2.254 | 2011 | |
| 76 | Jerry Lomond | 2.255 | 1994 | |
| 77 | Rory Sawyer | 2.256 | 2049 | |
| 78 | Juan Valdéz | 2.258 | 1998 | |
| 79 | Maxime Belmondo | 2.268 | 1992 | |
| 80 | Mike Ramirez | 2.271 | 2057 | |
| 81 | Alan Pak | 2.274 | 2058 | |
| 82 | Domingo Bravo | 2.276 | 2011 | |
| 83 | Glen O'Brian | 2.278 | 1993 | |
| 84 | Andrew Cramer | 2.288 | 2040 | |
| 84 | Boyd Burnett | 2.288 | 2000 | |
| 86 | Jesus Portillo | 2.292 | 2060 | |
| 87 | Miguel Vásquez | 2.295 | 2008 | |
| 88 | José Torres | 2.299 | 2045 | |
| 89 | Naganori Oka | 2.301 | 2047 | |
| 90 | Javier Solano | 2.312 | 2004 | |
| 91 | Lawrence Moran | 2.313 | 2008 | |
| 92 | David Losoya | 2.316 | 2031 | |
| 93 | Alonso Ayala | 2.318 | 2004 | |
| 94 | Jesse Simpson | 2.319 | 2032 | |
| 95 | Dan Zhou | 2.321 | 2040 | |
| 95 | Bill Carr | 2.321 | 2037 | |
| 97 | Dusty Hicks# | 2.322 | 2071 | |
| 97 | Rico Santoya# | 2.322 | 2071 | |
| 99 | Preston Clendinning | 2.323 | 1999 | |
| 100 | Marco Nieves# | 2.324 | 2073 |
