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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Rin Sakai# | 1.002 | 2074 | |
| 2 | Enrico Matarazzo | 1.041 | 2014 | |
| 3 | Xavier Raya | 1.245 | 2059 | |
| 4 | Mark Knight | 1.248 | 2018 | |
| 5 | Jim Weeks | 1.261 | 2010 | |
| 6 | Kingsley Bozek# | 1.299 | 2079 | |
| 7 | Nolan Park | 1.329 | 2027 | |
| 8 | Takayuri Nakayama# | 1.335 | 2081 | |
| 9 | Vincent Bodine | 1.360 | 2018 | |
| 10 | Ricky Glass | 1.366 | 2016 | |
| 11 | Osmany Duarte# | 1.373 | 2078 | |
| 12 | Edgardo Mendoza | 1.378 | 2035 | |
| 13 | Johnny Veenstra# | 1.380 | 2068 | |
| 14 | Benito Cossutta# | 1.395 | 2080 | |
| 15 | George Lloyd | 1.409 | 2039 | |
| 16 | Carl DeYoung | 1.416 | 2012 | |
| 17 | Francis Marriott | 1.430 | 2065 | |
| 18 | Brandon Halfhill# | 1.438 | 2078 | |
| 19 | Takaya Harada | 1.444 | 2064 | |
| 20 | Salvatorio Boti | 1.450 | 2043 | |
| 21 | Carlos Hoyos# | 1.461 | 2070 | |
| 22 | Kunimatsu Myaji# | 1.479 | 2080 | |
| 23 | Bobby Makeever | 1.483 | 2053 | |
| 24 | Eduardo Serrano# | 1.489 | 2078 | |
| 25 | Hector Ortiz# | 1.503 | 2079 | |
| 26 | Justin Harper | 1.504 | 2051 | |
| 27 | Domingo Montoya | 1.507 | 2032 | |
| 28 | Monty Viadana | 1.511 | 2059 | |
| 29 | Edwin Osorio | 1.524 | 2066 | |
| 30 | Eddie Robinson | 1.537 | 2058 | |
| 31 | Ken Shearn# | 1.538 | 2078 | |
| 32 | Alvin Pitts | 1.540 | 2033 | |
| 33 | Júlio Romo | 1.545 | 2022 | |
| 34 | Toby Halls | 1.553 | 2054 | |
| 35 | Xavier Oliva | 1.560 | 2013 | |
| 36 | Hawk Hartshorn# | 1.562 | 2077 | |
| 37 | Lawrence Boulter | 1.563 | 2022 | |
| 38 | Luchino Pegoretti | 1.567 | 2049 | |
| 39 | Lawrence Boulter | 1.573 | 2030 | |
| 40 | Zhi-qiang Meng# | 1.576 | 2081 | |
| 41 | Rin Sakai# | 1.588 | 2073 | |
| 41 | Ed Burr# | 1.588 | 2080 | |
| 41 | Roy Hackett# | 1.588 | 2081 | |
| 44 | Kozue Takemoto | 1.592 | 2064 | |
| 45 | Brian Fisher# | 1.604 | 2081 | |
| 46 | Johnny Johnston | 1.611 | 2011 | |
| 47 | Júlio Díaz | 1.618 | 2039 | |
| 48 | Hawk Hartshorn# | 1.619 | 2076 | |
| 49 | Seung-woo Kim# | 1.623 | 2080 | |
| 50 | Cameron Sweat# | 1.626 | 2081 | |
| 51 | Antonio Ceballos | 1.627 | 2056 | |
| 52 | Thom McLymont | 1.629 | 2024 | |
| 53 | Ray Helton# | 1.630 | 2081 | |
| 54 | Gil Orton | 1.631 | 2028 | |
| 55 | Ivan Aceves# | 1.634 | 2081 | |
| 56 | Cody Wiggins | 1.636 | 2018 | |
| 57 | Lúcio Olvera | 1.638 | 2030 | |
| 58 | Steve Bartlett | 1.640 | 2053 | |
| 59 | Cal Clark | 1.652 | 2009 | |
| 59 | Dan Ashe | 1.652 | 2024 | |
| 61 | Miguel Delgado | 1.653 | 2047 | |
| 62 | Bailey McClellan | 1.657 | 2011 | |
| 63 | Edwin Castaneda# | 1.660 | 2080 | |
| 64 | Tetsukazu Kaneda# | 1.666 | 2066 | |
| 65 | Cedric Droog# | 1.667 | 2077 | |
| 66 | Don Raynor | 1.669 | 2016 | |
| 67 | Dan Craig | 1.674 | 2027 | |
| 68 | Brenden Turner | 1.677 | 2041 | |
| 68 | Henry Escobedo# | 1.677 | 2078 | |
| 70 | Júlio Marroquín | 1.678 | 2048 | |
| 71 | Jorge Lorez | 1.683 | 1990 | |
| 71 | Eduardo Leon# | 1.683 | 2079 | |
| 73 | Dave Minarik# | 1.687 | 2078 | |
| 74 | Derek Farris | 1.691 | 2022 | |
| 75 | Edwin Beltran | 1.702 | 2064 | |
| 76 | Dave Beck | 1.704 | 2030 | |
| 77 | Mario Carrisalez# | 1.705 | 2081 | |
| 78 | Román Hernández | 1.711 | 2048 | |
| 79 | Cheh Ye# | 1.714 | 2076 | |
| 80 | Víctor Meléndez | 1.720 | 2032 | |
| 80 | Garrett Swarthout | 1.720 | 2074 | |
| 82 | Harold Morris | 1.722 | 2025 | |
| 83 | Jose Martinez# | 1.723 | 2079 | |
| 84 | Brian Morris | 1.725 | 2023 | |
| 85 | César Ruíz | 1.726 | 2050 | |
| 86 | Russ Fowler | 1.732 | 2025 | |
| 87 | Rajam Masrani# | 1.751 | 2079 | |
| 87 | Tony Pabon | 1.751 | 2066 | |
| 89 | Gavin Gravelle | 1.755 | 2070 | |
| 89 | Bill Garza# | 1.755 | 2079 | |
| 89 | Cecilio Dimiceli | 1.755 | 2055 | |
| 92 | Glenn Schultz | 1.756 | 2027 | |
| 93 | Alex Proulx | 1.758 | 2039 | |
| 94 | Jim Tuff | 1.759 | 2047 | |
| 95 | Jerry Cunningham | 1.761 | 2007 | |
| 96 | Quinn Topp# | 1.762 | 2079 | |
| 97 | Mike Anderson# | 1.764 | 2080 | |
| 98 | Dean Salter | 1.767 | 2071 | |
| 98 | Frank Osborne | 1.767 | 2019 | |
| 98 | Jeffrey Barrett | 1.767 | 2044 |
