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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 | Nolan Park | 1.329 | 2027 | |
| 7 | Vincent Bodine | 1.360 | 2018 | |
| 8 | Ricky Glass | 1.366 | 2016 | |
| 9 | Edgardo Mendoza | 1.378 | 2035 | |
| 10 | Johnny Veenstra# | 1.380 | 2068 | |
| 11 | George Lloyd | 1.409 | 2039 | |
| 12 | Carl DeYoung | 1.416 | 2012 | |
| 13 | Francis Marriott | 1.430 | 2065 | |
| 14 | Takaya Harada | 1.444 | 2064 | |
| 15 | Salvatorio Boti | 1.450 | 2043 | |
| 16 | Carlos Hoyos# | 1.461 | 2070 | |
| 17 | Bobby Makeever | 1.483 | 2053 | |
| 18 | Justin Harper | 1.504 | 2051 | |
| 19 | Domingo Montoya | 1.507 | 2032 | |
| 20 | Monty Viadana# | 1.511 | 2059 | |
| 21 | Edwin Osorio# | 1.524 | 2066 | |
| 22 | Eddie Robinson | 1.537 | 2058 | |
| 23 | Alvin Pitts | 1.540 | 2033 | |
| 24 | Júlio Romo | 1.545 | 2022 | |
| 25 | Toby Halls | 1.553 | 2054 | |
| 26 | Xavier Oliva | 1.560 | 2013 | |
| 27 | Lawrence Boulter | 1.563 | 2022 | |
| 28 | Luchino Pegoretti | 1.567 | 2049 | |
| 29 | Lawrence Boulter | 1.573 | 2030 | |
| 30 | Rin Sakai# | 1.588 | 2073 | |
| 31 | Kozue Takemoto | 1.592 | 2064 | |
| 32 | Johnny Johnston | 1.611 | 2011 | |
| 33 | Júlio Díaz | 1.618 | 2039 | |
| 34 | Antonio Ceballos# | 1.627 | 2056 | |
| 35 | Thom McLymont | 1.629 | 2024 | |
| 36 | Gil Orton | 1.631 | 2028 | |
| 37 | Cody Wiggins | 1.636 | 2018 | |
| 38 | Lúcio Olvera | 1.638 | 2030 | |
| 39 | Steve Bartlett | 1.640 | 2053 | |
| 40 | Dan Ashe | 1.652 | 2024 | |
| 40 | Cal Clark | 1.652 | 2009 | |
| 42 | Miguel Delgado | 1.653 | 2047 | |
| 43 | Bailey McClellan | 1.657 | 2011 | |
| 44 | Tetsukazu Kaneda# | 1.666 | 2066 | |
| 45 | Don Raynor | 1.669 | 2016 | |
| 46 | Dan Craig | 1.674 | 2027 | |
| 47 | Brenden Turner | 1.677 | 2041 | |
| 48 | Júlio Marroquín | 1.678 | 2048 | |
| 49 | Jorge Lorez | 1.683 | 1990 | |
| 50 | Derek Farris | 1.691 | 2022 | |
| 51 | Edwin Beltran | 1.702 | 2064 | |
| 52 | Dave Beck | 1.704 | 2030 | |
| 53 | Román Hernández | 1.711 | 2048 | |
| 54 | Víctor Meléndez | 1.720 | 2032 | |
| 54 | Garrett Swarthout# | 1.720 | 2074 | |
| 56 | Harold Morris | 1.722 | 2025 | |
| 57 | Brian Morris | 1.725 | 2023 | |
| 58 | César Ruíz | 1.726 | 2050 | |
| 59 | Russ Fowler | 1.732 | 2025 | |
| 60 | Tony Pabon | 1.751 | 2066 | |
| 61 | Gavin Gravelle# | 1.755 | 2070 | |
| 61 | Cecilio Dimiceli | 1.755 | 2055 | |
| 63 | Glenn Schultz | 1.756 | 2027 | |
| 64 | Alex Proulx | 1.758 | 2039 | |
| 65 | Jim Tuff | 1.759 | 2047 | |
| 66 | Jerry Cunningham | 1.761 | 2007 | |
| 67 | Dean Salter# | 1.767 | 2071 | |
| 67 | Frank Osborne | 1.767 | 2019 | |
| 67 | Jeffrey Barrett | 1.767 | 2044 | |
| 70 | Joe Parker | 1.776 | 2021 | |
| 71 | Feitze Spruijt | 1.795 | 2050 | |
| 72 | Brandon Benoit | 1.804 | 2041 | |
| 73 | Ricky Brooks | 1.805 | 2051 | |
| 74 | Rien Berendsen | 1.807 | 2043 | |
| 75 | Rich Longworth | 1.809 | 2058 | |
| 76 | Joe Turner | 1.818 | 2025 | |
| 77 | Martin Henderson | 1.826 | 1994 | |
| 78 | Albin Vitalini | 1.832 | 2045 | |
| 78 | Micah Moran | 1.832 | 2015 | |
| 80 | Everett Ritter | 1.833 | 2052 | |
| 81 | Bobby Makeever | 1.834 | 2051 | |
| 82 | Jesús Perea | 1.840 | 2023 | |
| 83 | Dustin Deerfield | 1.844 | 2069 | |
| 83 | Rogelio Anez# | 1.844 | 2069 | |
| 85 | Curt O'Mullen | 1.847 | 2020 | |
| 86 | Alex Ewing | 1.849 | 2011 | |
| 87 | Jonah Cooper Jr.# | 1.852 | 2066 | |
| 88 | Larry Mears | 1.854 | 2065 | |
| 89 | Jamie Fletcher | 1.855 | 2018 | |
| 90 | Jesús Ramos | 1.862 | 2057 | |
| 90 | José Flores | 1.862 | 2040 | |
| 92 | Ewan Hartridge | 1.864 | 2063 | |
| 93 | Joe Coffman | 1.868 | 2000 | |
| 93 | Danny Veras | 1.868 | 2057 | |
| 95 | Larry Duplessis* | 1.869 | 2010 | |
| 96 | Rock St-Jean | 1.870 | 2054 | |
| 97 | Nate Potter | 1.884 | 2008 | |
| 98 | Barry Ward | 1.885 | 2009 | |
| 99 | Alberto Zamora# | 1.892 | 2070 | |
| 100 | Lawrence Alexander | 1.893 | 2034 |
