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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WPCT | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Hal Newhouser# | .947 | 1999 | |
| 2 | Jack Fisher# | .889 | 1998 | |
| 3 | Van Mungo# | .880 | 1995 | |
| 4 | Nolan Ryan | .870 | 1984 | |
| 5 | Marty Bystrom | .850 | 1983 | |
| 6 | Dave LaPoint | .844 | 1984 | |
| 7 | Dennis Martinez | .833 | 1989 | |
| 8 | Ed Brandt# | .826 | 1991 | |
| 9 | Johnny Lush | .815 | 1994 | |
| 10 | Marty Bystrom | .810 | 1981 | |
| 11 | Patrick Corbin | .806 | 1989 | |
| 12 | Dan Haren# | .800 | 1995 | |
| 12 | Kenta Maeda | .800 | 1993 | |
| 14 | Steve Rogers | .789 | 1981 | |
| 14 | Johnny Lush | .789 | 1993 | |
| 16 | Frank Tanana | .786 | 1985 | |
| 17 | Fernando Valenzuela* | .784 | 1984 | |
| 18 | Johnny Lush | .778 | 1991 | |
| 18 | Al Orth# | .778 | 1992 | |
| 18 | Ed Whitson | .778 | 1988 | |
| 21 | Scott Kazmir# | .773 | 1996 | |
| 21 | Al Mamaux# | .773 | 1995 | |
| 23 | Van Mungo# | .769 | 1994 | |
| 24 | Van Mungo# | .760 | 1996 | |
| 24 | Steve Carlton | .760 | 1983 | |
| 24 | John Candelaria | .760 | 1986 | |
| 27 | Bill Gullickson | .759 | 1980 | |
| 28 | Lefty Grove# | .750 | 1997 | |
| 28 | Roger Clemens# | .750 | 1991 | |
| 28 | Marty Bystrom | .750 | 1982 | |
| 31 | Fernando Valenzuela* | .742 | 1988 | |
| 32 | Al Orth# | .739 | 1994 | |
| 33 | Billy Loes | .737 | 1993 | |
| 34 | Jeff Weaver# | .731 | 1990 | |
| 34 | Fernando Valenzuela* | .731 | 1983 | |
| 34 | Roger Clemens# | .731 | 1996 | |
| 37 | Bruce Hurst | .727 | 1989 | |
| 37 | Bruce Hurst | .727 | 1986 | |
| 37 | Dennis Eckersley | .727 | 1981 | |
| 37 | Rick Rhoden | .727 | 1981 | |
| 37 | Al Mamaux# | .727 | 1994 | |
| 42 | Bob Ojeda | .724 | 1986 | |
| 42 | Ron Guidry | .724 | 1987 | |
| 42 | Joe Lake | .724 | 1991 | |
| 45 | Jeff C D'Amico | .722 | 1988 | |
| 46 | Christy Mathewson# | .720 | 1996 | |
| 46 | Dave Righetti# | .720 | 1995 | |
| 48 | Bruce Berenyi | .719 | 1981 | |
| 49 | Kevin Appier# | .714 | 1989 | |
| 49 | Yu Darvish# | .714 | 1999 | |
| 49 | Rick Rhoden | .714 | 1982 | |
| 49 | Fernando Valenzuela* | .714 | 1981 | |
| 49 | Charlie Leibrandt | .714 | 1989 | |
| 49 | Len Barker | .714 | 1980 | |
| 49 | Ben Sheets# | .714 | 1988 | |
| 56 | Jerry Reuss | .710 | 1981 | |
| 56 | Steve Carlton | .710 | 1982 | |
| 58 | Bill Gullickson | .708 | 1981 | |
| 59 | Roger Clemens# | .706 | 1989 | |
| 59 | Scott T Baker | .706 | 1989 | |
| 61 | Bob Ojeda | .704 | 1988 | |
| 62 | Roger Clemens# | .700 | 1984 | |
| 62 | Hal Newhouser# | .700 | 1998 | |
| 62 | Willie Foster# | .700 | 1998 | |
| 62 | Mike Scott | .700 | 1986 | |
| 62 | Patrick Corbin | .700 | 1995 | |
| 62 | Jack Morris | .700 | 1992 | |
| 68 | Kevin Appier# | .697 | 1992 | |
| 69 | Al Mamaux# | .696 | 1997 | |
| 69 | Kevin Appier# | .696 | 1994 | |
| 69 | Ernie Broglio# | .696 | 1997 | |
| 72 | Lefty Grove# | .694 | 1991 | |
| 73 | Fernando Valenzuela* | .692 | 1982 | |
| 73 | Frank Browning# | .692 | 1992 | |
| 73 | Early Wynn# | .692 | 1950 | |
| 73 | John Tudor | .692 | 1986 | |
| 77 | Moose Haas | .690 | 1987 | |
| 77 | Rick Rhoden | .690 | 1980 | |
| 77 | David Clyde# | .690 | 1992 | |
| 80 | Miles Mikolas# | .688 | 1997 | |
| 81 | Jeff C D'Amico | .684 | 1986 | |
| 81 | Paul Derringer# | .684 | 1999 | |
| 83 | Johnny Cueto# | .682 | 1999 | |
| 83 | Roger Clemens# | .682 | 1995 | |
| 83 | Heinie Berger# | .682 | 1998 | |
| 83 | Ed Whitson | .682 | 1981 | |
| 83 | Ernie Broglio# | .682 | 1995 | |
| 83 | Juan Marichal# | .682 | 1998 | |
| 89 | J R Richard | .680 | 1982 | |
| 89 | Jim Bunning# | .680 | 1998 | |
| 89 | Frank Tanana | .680 | 1983 | |
| 89 | Kenta Maeda | .680 | 1990 | |
| 93 | Bert Blyleven | .679 | 1980 | |
| 94 | Fernando Valenzuela* | .677 | 1986 | |
| 94 | Roger Clemens# | .677 | 1990 | |
| 96 | Frank Tanana | .676 | 1987 | |
| 97 | Doyle Alexander | .667 | 1987 | |
| 97 | Patrick Corbin | .667 | 1988 | |
| 97 | Patrick Corbin | .667 | 1990 | |
| 97 | Don Robinson | .667 | 1986 |
