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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WAR | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Fernando Valenzuela* | 12.27 | 1984 | |
| 2 | Lefty Grove# | 10.23 | 1989 | |
| 3 | Fernando Valenzuela* | 10.16 | 1982 | |
| 3 | Roger Clemens# | 10.16 | 1984 | |
| 5 | Lefty Grove# | 9.73 | 1991 | |
| 6 | Lefty Grove# | 9.33 | 1990 | |
| 7 | Roger Clemens# | 8.95 | 1990 | |
| 8 | Lefty Grove# | 8.87 | 1988 | |
| 9 | Lefty Grove# | 8.71 | 1993 | |
| 10 | Roger Clemens# | 8.57 | 1987 | |
| 11 | Van Mungo# | 8.39 | 1994 | |
| 12 | Lefty Grove# | 8.22 | 1992 | |
| 13 | Patrick Corbin | 8.08 | 1989 | |
| 14 | Rick Rhoden | 7.90 | 1984 | |
| 15 | Roger Clemens# | 7.85 | 1991 | |
| 16 | Jack McDowell | 7.79 | 1986 | |
| 17 | Christy Mathewson# | 7.75 | 1996 | |
| 18 | Arlie Pond# | 7.73 | 1991 | |
| 19 | Frank Browning# | 7.68 | 1992 | |
| 20 | Bruce Berenyi | 7.65 | 1984 | |
| 21 | Fernando Valenzuela* | 7.64 | 1986 | |
| 22 | Al Orth# | 7.52 | 1996 | |
| 23 | Fernando Valenzuela* | 7.50 | 1985 | |
| 23 | Nolan Ryan | 7.50 | 1984 | |
| 25 | Fernando Valenzuela* | 7.39 | 1983 | |
| 26 | Al Orth# | 7.31 | 1992 | |
| 27 | Dave Stieb | 7.22 | 1984 | |
| 28 | Christy Mathewson# | 7.19 | 1997 | |
| 29 | Mario Soto | 7.17 | 1982 | |
| 30 | Bill Gullickson | 7.15 | 1981 | |
| 31 | Kevin Appier# | 7.07 | 1992 | |
| 32 | Clayton Kershaw# | 6.98 | 1996 | |
| 32 | Roger Clemens# | 6.98 | 1986 | |
| 34 | Dave LaPoint | 6.96 | 1984 | |
| 35 | Dave Righetti# | 6.90 | 1992 | |
| 36 | John Candelaria | 6.88 | 1986 | |
| 37 | Bill Gullickson | 6.86 | 1980 | |
| 38 | Bob Ojeda | 6.80 | 1986 | |
| 39 | Roger Clemens# | 6.77 | 1989 | |
| 40 | Larry Christenson | 6.76 | 1982 | |
| 41 | Heinie Berger# | 6.72 | 1996 | |
| 42 | Patrick Corbin | 6.67 | 1988 | |
| 43 | Lefty Grove# | 6.65 | 1987 | |
| 44 | Bob Ojeda | 6.60 | 1988 | |
| 45 | Heinie Berger# | 6.58 | 1994 | |
| 46 | Don Robinson | 6.57 | 1984 | |
| 47 | Roger Clemens# | 6.54 | 1985 | |
| 47 | Jimmy Dygert# | 6.54 | 1998 | |
| 49 | Mike Scott | 6.51 | 1989 | |
| 50 | Steve Carlton | 6.50 | 1982 | |
| 51 | Fernando Valenzuela* | 6.49 | 1981 | |
| 52 | Claude Osteen# | 6.48 | 1994 | |
| 53 | John Candelaria | 6.44 | 1982 | |
| 54 | Don Robinson | 6.42 | 1986 | |
| 55 | Lefty Grove# | 6.41 | 1994 | |
| 56 | Rick Rhoden | 6.34 | 1983 | |
| 57 | Fernando Valenzuela* | 6.32 | 1988 | |
| 58 | Marty Bystrom | 6.31 | 1983 | |
| 59 | Roger Clemens# | 6.29 | 1992 | |
| 60 | Steve Carlton | 6.27 | 1980 | |
| 61 | Mike Scott | 6.25 | 1986 | |
| 61 | Van Mungo# | 6.25 | 1995 | |
| 63 | Heinie Berger# | 6.24 | 1998 | |
| 64 | Heinie Berger# | 6.23 | 1995 | |
| 65 | Bruce Hurst | 6.20 | 1989 | |
| 66 | Fernando Valenzuela* | 6.16 | 1987 | |
| 67 | Masahiro Tanaka | 6.15 | 1986 | |
| 68 | Scott T Baker | 6.13 | 1986 | |
| 68 | Mario Soto | 6.13 | 1981 | |
| 70 | Rick Rhoden | 6.10 | 1986 | |
| 71 | Joe Lake | 6.09 | 1991 | |
| 71 | Kevin Appier# | 6.09 | 1991 | |
| 73 | Jack McDowell | 6.07 | 1989 | |
| 74 | Charlie Leibrandt | 6.06 | 1991 | |
| 75 | Pete Alexander# | 6.03 | 1999 | |
| 76 | Christy Mathewson# | 5.98 | 1998 | |
| 77 | John Denny | 5.96 | 1988 | |
| 77 | Bert Inks# | 5.96 | 1997 | |
| 79 | Jack McDowell | 5.94 | 1990 | |
| 79 | Charlie Leibrandt | 5.94 | 1986 | |
| 81 | Patrick Corbin | 5.91 | 1990 | |
| 81 | Bill Wise# | 5.91 | 1992 | |
| 83 | Bruce Berenyi | 5.89 | 1981 | |
| 84 | Dan Haren# | 5.80 | 1995 | |
| 85 | Steve Rogers | 5.74 | 1980 | |
| 85 | Felix Hernandez# | 5.74 | 1998 | |
| 87 | John Tudor | 5.72 | 1986 | |
| 88 | Nolan Ryan | 5.66 | 1980 | |
| 88 | Dave Righetti# | 5.66 | 1995 | |
| 90 | Felix Hernandez# | 5.64 | 1996 | |
| 91 | Larry McWilliams | 5.63 | 1984 | |
| 92 | Rick Reuschel | 5.60 | 1980 | |
| 93 | Masahiro Tanaka | 5.58 | 1985 | |
| 94 | Len Barker | 5.52 | 1980 | |
| 95 | Al Mamaux# | 5.50 | 1995 | |
| 96 | Roger Clemens# | 5.49 | 1997 | |
| 96 | Jim Bunning# | 5.49 | 1998 | |
| 98 | Vinegar Bend Mizell# | 5.48 | 1991 | |
| 98 | Frank Browning# | 5.48 | 1991 | |
| 100 | Bert Blyleven | 5.45 | 1980 |
