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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Earl Lawson | 1.077 | 2041 | |
| 2 | Daniel Dynamo | 1.180 | 2031 | |
| 3 | Naomi Akiyama | 1.227 | 2055 | |
| 4 | Víctor Féliz | 1.362 | 2039 | |
| 5 | Pedro Hernández | 1.448 | 2050 | |
| 6 | Joe Castillo | 1.451 | 2032 | |
| 7 | Alonso Martínez | 1.489 | 2039 | |
| 8 | Naomi Akiyama | 1.550 | 2054 | |
| 9 | Alonso Martínez | 1.568 | 2040 | |
| 10 | Raúl Medina | 1.613 | 2055 | |
| 11 | Tom Hearn | 1.619 | 2072 | |
| 12 | Júlio Ramírez | 1.627 | 2075 | |
| 13 | Walt Willett# | 1.631 | 2095 | |
| 14 | Manuel Elías# | 1.636 | 2092 | |
| 14 | Armando Monje | 1.636 | 2045 | |
| 16 | Quinton Preston | 1.650 | 2049 | |
| 17 | Steve Muros | 1.669 | 2061 | |
| 17 | Claudio Lara | 1.669 | 2072 | |
| 19 | Kelly Bowen | 1.680 | 2034 | |
| 20 | Mario Vázquez# | 1.695 | 2090 | |
| 21 | César Cruz | 1.710 | 2042 | |
| 22 | Ray Odom | 1.715 | 2040 | |
| 23 | Clifford Payne | 1.726 | 2031 | |
| 24 | Mark Schultz# | 1.737 | 2092 | |
| 25 | César López | 1.738 | 2070 | |
| 26 | Cristo Rovlaz | 1.739 | 2040 | |
| 27 | José Rodríguez# | 1.754 | 2091 | |
| 28 | Kelly Bowen | 1.770 | 2035 | |
| 29 | Alonso Pérez | 1.772 | 2080 | |
| 30 | Ramón Garza | 1.778 | 2064 | |
| 31 | Manuel Abad | 1.784 | 2032 | |
| 32 | António González | 1.797 | 2033 | |
| 33 | José Alvarado | 1.800 | 2056 | |
| 33 | Ken King | 1.800 | 2036 | |
| 33 | Cisco Blondet | 1.800 | 2053 | |
| 36 | Ryan Chapman | 1.804 | 2059 | |
| 37 | Bailey Moyle | 1.816 | 2042 | |
| 38 | Benny Thornton | 1.835 | 2054 | |
| 39 | Cisco Blondet | 1.841 | 2055 | |
| 40 | Alex McNee# | 1.842 | 2091 | |
| 41 | Fernando Gómez# | 1.843 | 2090 | |
| 42 | John Bruce | 1.847 | 2038 | |
| 43 | Luis Hernández | 1.874 | 2078 | |
| 44 | Lauren Honshorst | 1.895 | 2075 | |
| 45 | Anthony Raymond | 1.901 | 2061 | |
| 46 | Adam Douglas | 1.905 | 2083 | |
| 47 | Theodosio Benoliel# | 1.907 | 2094 | |
| 47 | Matthew Bissonnette | 1.907 | 2051 | |
| 49 | Chris Cable# | 1.908 | 2093 | |
| 50 | Javier Mediavilla | 1.911 | 2049 | |
| 51 | Corey Bowden | 1.919 | 2035 | |
| 52 | Pat Ford# | 1.921 | 2092 | |
| 52 | Ramón Granados | 1.921 | 2084 | |
| 54 | Carter Folsom | 1.929 | 2053 | |
| 55 | Héctor Flores | 1.936 | 2071 | |
| 56 | Rhett Clark | 1.945 | 2035 | |
| 56 | Pancho Rosado | 1.945 | 2052 | |
| 58 | Rafael Bautista# | 1.954 | 2087 | |
| 59 | Cisco Blondet | 1.966 | 2054 | |
| 60 | Robbie Witherden | 1.976 | 2057 | |
| 61 | Edgardo Rojas# | 1.979 | 2092 | |
| 62 | Poker Hoyle | 1.985 | 2030 | |
| 63 | Donovan Bailey | 1.987 | 2057 | |
| 64 | David King | 2.009 | 2044 | |
| 65 | Javier Cota | 2.021 | 2092 | |
| 65 | Edwin Alexander | 2.021 | 2056 | |
| 67 | Joe Phillips | 2.026 | 2072 | |
| 68 | José Velásquez | 2.028 | 2051 | |
| 69 | Manny Velasco | 2.029 | 2047 | |
| 70 | César Cruz | 2.030 | 2043 | |
| 71 | Ken Finn | 2.034 | 2032 | |
| 72 | Ethan Hebert | 2.039 | 2055 | |
| 73 | Ron Dalton | 2.045 | 2087 | |
| 73 | Cristo Rovlaz | 2.045 | 2038 | |
| 75 | Evan Verheijen | 2.049 | 2087 | |
| 75 | Juan Santos | 2.049 | 2051 | |
| 77 | Jeff Sparkes | 2.050 | 2034 | |
| 78 | Juan Fernández | 2.052 | 2051 | |
| 79 | Michael Harris | 2.055 | 2044 | |
| 80 | José Lozano | 2.058 | 2046 | |
| 81 | Romeu Ashton# | 2.065 | 2087 | |
| 82 | Frasco Andunvar Jr. | 2.070 | 2060 | |
| 83 | Shawn Walker | 2.073 | 2034 | |
| 83 | Felipe López | 2.073 | 2052 | |
| 85 | Jeffrey Shannon | 2.077 | 2043 | |
| 85 | Corey Bowden | 2.077 | 2034 | |
| 87 | Randy Hughes# | 2.084 | 2089 | |
| 88 | Alarico Lieftinck# | 2.086 | 2094 | |
| 89 | Benny Thornton | 2.087 | 2055 | |
| 89 | Glenn Fox | 2.087 | 2069 | |
| 91 | Wayne Shook | 2.091 | 2041 | |
| 92 | Rafael Salas# | 2.092 | 2092 | |
| 93 | Eric Narborough | 2.093 | 2064 | |
| 94 | Vaughan Pierce | 2.105 | 2077 | |
| 95 | Salvador Urbina# | 2.114 | 2092 | |
| 95 | Orlondo Valdnei | 2.114 | 2034 | |
| 95 | Sergio Ortega | 2.114 | 2047 | |
| 98 | Salvador Calderón# | 2.119 | 2091 | |
| 98 | Rafael Gonzáles | 2.119 | 2077 | |
| 100 | Howard Johnston | 2.125 | 2071 |
