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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | H9 | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Nolan Ryan | 4.49 | 1984 | |
| 2 | Fernando Valenzuela* | 5.15 | 1984 | |
| 3 | Dave LaPoint | 5.77 | 1984 | |
| 4 | Larry McWilliams | 6.09 | 1984 | |
| 5 | Herb Score# | 6.26 | 1955 | |
| 6 | Roger Clemens# | 6.36 | 1984 | |
| 7 | Hal Newhouser# | 6.39 | 1999 | |
| 8 | Christy Mathewson# | 6.41 | 1997 | |
| 9 | Fernando Valenzuela* | 6.46 | 1983 | |
| 10 | Vinegar Bend Mizell# | 6.47 | 1990 | |
| 11 | Fernando Valenzuela* | 6.60 | 1980 | |
| 12 | Fernando Valenzuela* | 6.61 | 1981 | |
| 12 | Christy Mathewson# | 6.61 | 1996 | |
| 14 | Mario Soto | 6.76 | 1982 | |
| 15 | Roger Clemens# | 6.79 | 1990 | |
| 15 | Frank Tanana | 6.79 | 1984 | |
| 17 | J R Richard | 6.80 | 1984 | |
| 17 | J R Richard | 6.80 | 1982 | |
| 17 | Dave Righetti# | 6.80 | 1993 | |
| 20 | Bill Wise# | 6.82 | 1990 | |
| 20 | Bill Gullickson | 6.82 | 1980 | |
| 22 | Ed Brandt# | 6.83 | 1996 | |
| 23 | J A Happ# | 6.85 | 1993 | |
| 24 | Bert Blyleven | 6.86 | 1980 | |
| 25 | Mike LaCoss | 6.91 | 1984 | |
| 26 | Bruce Berenyi | 6.92 | 1982 | |
| 27 | Fernando Valenzuela* | 6.96 | 1982 | |
| 27 | Hal Newhouser# | 6.96 | 1998 | |
| 29 | Kenta Maeda | 6.97 | 1993 | |
| 30 | Pascual Perez | 6.99 | 1984 | |
| 30 | Early Wynn# | 6.99 | 1950 | |
| 32 | Mario Soto | 7.00 | 1981 | |
| 32 | Mike Krukow | 7.00 | 1984 | |
| 32 | Ed Whitson | 7.00 | 1981 | |
| 32 | Scott Kazmir# | 7.00 | 1996 | |
| 36 | Steve Carlton | 7.05 | 1982 | |
| 37 | Dave Stieb | 7.06 | 1984 | |
| 37 | Herb Score# | 7.06 | 1999 | |
| 39 | Nolan Ryan | 7.07 | 1980 | |
| 40 | Gus Krock | 7.09 | 1984 | |
| 41 | Felix Hernandez# | 7.10 | 1996 | |
| 42 | Johnny Lush | 7.11 | 1993 | |
| 43 | Rick Rhoden | 7.18 | 1984 | |
| 44 | Bruce Berenyi | 7.19 | 1981 | |
| 45 | Marty Bystrom | 7.20 | 1983 | |
| 46 | Christy Mathewson# | 7.21 | 1998 | |
| 47 | Lefty Grove# | 7.23 | 1989 | |
| 48 | John Candelaria | 7.27 | 1982 | |
| 49 | Van Mungo# | 7.31 | 1994 | |
| 49 | Curry Foley# | 7.31 | 1994 | |
| 51 | Rudy May | 7.32 | 1980 | |
| 51 | Nolan Ryan | 7.32 | 1983 | |
| 53 | Nolan Ryan | 7.34 | 1981 | |
| 54 | Lefty Grove# | 7.35 | 1993 | |
| 55 | Bruce Berenyi | 7.37 | 1984 | |
| 56 | Frank Tanana | 7.38 | 1983 | |
| 57 | Felix Hernandez# | 7.39 | 1997 | |
| 58 | Bill Walker# | 7.41 | 1996 | |
| 58 | Len Barker | 7.41 | 1984 | |
| 60 | Patrick Corbin | 7.42 | 1984 | |
| 61 | Len Barker | 7.43 | 1980 | |
| 61 | Vinegar Bend Mizell# | 7.43 | 1989 | |
| 63 | Bill Gullickson | 7.45 | 1982 | |
| 63 | Early Wynn# | 7.45 | 1951 | |
| 65 | Danny Darwin | 7.46 | 1990 | |
| 66 | Jim Beattie | 7.47 | 1983 | |
| 67 | Willie Foster# | 7.48 | 1998 | |
| 68 | Bob Welch | 7.50 | 1981 | |
| 69 | Al Orth# | 7.51 | 1996 | |
| 70 | Bill Wise# | 7.52 | 1991 | |
| 70 | Jim Bunning# | 7.52 | 1998 | |
| 72 | Roger Clemens# | 7.53 | 1996 | |
| 72 | Early Wynn# | 7.53 | 1952 | |
| 74 | Don Robinson | 7.54 | 1984 | |
| 75 | Tim Leary# | 7.55 | 1996 | |
| 75 | Van Mungo# | 7.55 | 1997 | |
| 75 | Kenta Maeda | 7.55 | 1994 | |
| 78 | J R Richard | 7.56 | 1980 | |
| 79 | John Tudor | 7.57 | 1981 | |
| 79 | Al Mamaux# | 7.57 | 1997 | |
| 79 | Fernando Valenzuela* | 7.57 | 1986 | |
| 79 | Al Mamaux# | 7.57 | 1994 | |
| 83 | Al Mamaux# | 7.59 | 1996 | |
| 84 | Gary Peters | 7.60 | 1995 | |
| 85 | Van Mungo# | 7.61 | 1995 | |
| 86 | Jeff C D'Amico | 7.62 | 1988 | |
| 86 | Len Barker | 7.62 | 1983 | |
| 88 | John Denny | 7.63 | 1984 | |
| 89 | Bill Gullickson | 7.64 | 1981 | |
| 90 | Jack Morris | 7.65 | 1983 | |
| 91 | Bob Bruce | 7.66 | 1993 | |
| 91 | Mike Boddicker | 7.66 | 1982 | |
| 93 | Patrick Corbin | 7.67 | 1989 | |
| 94 | Billy Loes | 7.68 | 1993 | |
| 94 | Fernando Valenzuela* | 7.68 | 1987 | |
| 94 | Roger Clemens# | 7.68 | 1995 | |
| 97 | Mario Soto | 7.69 | 1984 | |
| 98 | Dave Righetti# | 7.71 | 1996 | |
| 98 | Steve Carlton | 7.71 | 1984 | |
| 100 | Yu Darvish# | 7.73 | 1999 |
