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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | ERA | YEAR | Open Postseason Career Leaderboard |
|---|---|---|---|---|
| 1 | Mark Beatty | 0.000 | 2049 | |
| 1 | Joam Martini | 0.000 | 2042 | |
| 3 | Gordon Ziersch# | 0.307 | 2067 | |
| 4 | Juan Pérez | 0.403 | 2041 | |
| 5 | Francisco Ledesma | 0.409 | 2050 | |
| 5 | Tom Bolden | 0.409 | 2035 | |
| 7 | Edward Rascoe# | 0.429 | 2066 | |
| 8 | Hsin-pei Gui# | 0.450 | 2068 | |
| 9 | Fernando Franco# | 0.466 | 2069 | |
| 10 | Avery Craig | 0.587 | 2069 | |
| 11 | Kelvin Miller* | 0.600 | 2040 | |
| 11 | George Hernández* | 0.600 | 2046 | |
| 13 | Jerry Young Jr.# | 0.675 | 2069 | |
| 14 | Shojiro Ageda# | 0.684 | 2068 | |
| 15 | Marcos López | 0.723 | 2044 | |
| 16 | Edgardo Leal* | 0.750 | 2053 | |
| 17 | Chin Kang | 0.761 | 2033 | |
| 18 | Chris Topper* | 0.857 | 2029 | |
| 19 | Paul Thomson | 0.871 | 2034 | |
| 20 | Samuel Corley* | 0.900 | 2054 | |
| 20 | Keith Campbell | 0.900 | 2049 | |
| 22 | Kenneth Mazzariello | 0.910 | 2026 | |
| 23 | Jon Gilmore# | 0.923 | 2071 | |
| 24 | Francisco Fernández | 0.931 | 2038 | |
| 25 | Edgardo Leal* | 0.947 | 2054 | |
| 26 | Edgardo Leal* | 0.964 | 2055 | |
| 27 | Mike Brown | 1.012 | 2046 | |
| 28 | Luis Franco | 1.059 | 2040 | |
| 28 | Claude Reed | 1.059 | 2033 | |
| 30 | Hoyt Murphy# | 1.080 | 2063 | |
| 30 | Loren Berrian* | 1.080 | 2031 | |
| 32 | David Phillips* | 1.125 | 2028 | |
| 32 | Roger Stanley | 1.125 | 2043 | |
| 34 | William Jones | 1.149 | 2033 | |
| 35 | Kenneth Mazzariello | 1.184 | 2024 | |
| 35 | Willis Brown | 1.184 | 2047 | |
| 37 | Javier Romero | 1.200 | 2045 | |
| 37 | Héctor García | 1.200 | 2044 | |
| 37 | Esteban Martínez | 1.200 | 2061 | |
| 40 | Kenneth Benton | 1.209 | 2028 | |
| 41 | Juan Tirado* | 1.216 | 2038 | |
| 42 | Steve Morrow* | 1.241 | 2044 | |
| 43 | Mario Segura* | 1.250 | 2058 | |
| 44 | Pedro Díaz | 1.266 | 2035 | |
| 45 | Jesse Parker# | 1.286 | 2066 | |
| 45 | Gary Ballina | 1.286 | 2052 | |
| 47 | Edgar Dailey* | 1.296 | 2048 | |
| 48 | Felipe Delgado# | 1.301 | 2069 | |
| 49 | Carlos Ojeda | 1.306 | 2035 | |
| 50 | Juan Tirado* | 1.312 | 2039 | |
| 51 | Rick Ball | 1.331 | 2054 | |
| 52 | Alberto Murillo | 1.350 | 2025 | |
| 53 | Pedro Rivero | 1.364 | 2037 | |
| 54 | Marcos López | 1.385 | 2042 | |
| 54 | Mark Cotton | 1.385 | 2037 | |
| 56 | Chris Jouan# | 1.403 | 2071 | |
| 57 | Ernesto Alary# | 1.421 | 2069 | |
| 58 | Joe Romero | 1.446 | 2029 | |
| 59 | Juan Santana* | 1.486 | 2045 | |
| 60 | Felipe Delgado# | 1.514 | 2071 | |
| 61 | Tomás González | 1.517 | 2064 | |
| 62 | William Jones | 1.521 | 2041 | |
| 63 | Jesse Parker# | 1.528 | 2065 | |
| 63 | Gordon Ziersch# | 1.528 | 2065 | |
| 65 | Oscar Pineda | 1.565 | 2044 | |
| 65 | Carl Alexander | 1.565 | 2053 | |
| 67 | Francisco Fernández | 1.570 | 2039 | |
| 68 | Alfonso Coronado | 1.588 | 2054 | |
| 68 | Ánibal Escobar | 1.588 | 2067 | |
| 70 | Samuel Corley* | 1.615 | 2051 | |
| 71 | Harold Freeman* | 1.620 | 2029 | |
| 71 | Jon Porter | 1.620 | 2045 | |
| 71 | Jerry Young Jr.# | 1.620 | 2067 | |
| 71 | Ernesto Moreno | 1.620 | 2066 | |
| 71 | Chris Topper* | 1.620 | 2025 | |
| 76 | Roy Aronson | 1.627 | 2032 | |
| 77 | Juan Sánchez | 1.629 | 2043 | |
| 78 | Larry Ragot# | 1.636 | 2068 | |
| 79 | Carlos Ojeda | 1.646 | 2034 | |
| 79 | Tomás Quintero# | 1.646 | 2064 | |
| 81 | Jimmie Cook | 1.667 | 2027 | |
| 82 | Ricardo Soriano | 1.670 | 2056 | |
| 83 | Nate Ward* | 1.676 | 2050 | |
| 84 | Osvaldo Rivera | 1.688 | 2030 | |
| 84 | David Coy | 1.688 | 2026 | |
| 84 | Stephen Dundee# | 1.688 | 2068 | |
| 84 | Ron Cain | 1.688 | 2057 | |
| 84 | Stephen Dundee# | 1.688 | 2063 | |
| 84 | Ricardo Acevedo | 1.688 | 2036 | |
| 84 | Adrián Féliz | 1.688 | 2040 | |
| 91 | Anthony Murray* | 1.705 | 2041 | |
| 92 | Tyrone Walls | 1.714 | 2047 | |
| 92 | Cristo Gonzáles | 1.714 | 2058 | |
| 94 | Johnny Lee | 1.723 | 2055 | |
| 95 | Francisco Muñóz | 1.734 | 2063 | |
| 96 | Carlos Delgado# | 1.742 | 2068 | |
| 96 | Mario Segura* | 1.742 | 2057 | |
| 96 | James Endres | 1.742 | 2030 | |
| 99 | Eric Arias | 1.761 | 2024 | |
| 99 | Jerry Campbell | 1.761 | 2049 |
