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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | K9 | YEAR | Open Postseason Career Leaderboard |
|---|---|---|---|---|
| 1 | Mark Langston* | 12.41 | 1986 | |
| 2 | Freddie Toliver | 12.36 | 1984 | |
| 3 | Jhoan Duran# | 12.06 | 1988 | |
| 4 | Blake Snell# | 11.44 | 1997 | |
| 5 | Red Munger# | 11.00 | 1996 | |
| 6 | Dizzy Dean# | 10.80 | 1994 | |
| 7 | Tommy Boggs# | 10.62 | 1998 | |
| 8 | Roy Oswalt# | 10.17 | 1989 | |
| 9 | Daisuke Matsuzaka | 10.12 | 1987 | |
| 10 | Foster Edwards# | 10.00 | 1999 | |
| 11 | Dean Chance# | 9.95 | 2000 | |
| 12 | Daisuke Matsuzaka | 9.92 | 1989 | |
| 13 | Don Drysdale# | 9.77 | 1999 | |
| 14 | Bobby Shantz | 9.64 | 1987 | |
| 14 | Carl Hubbell# | 9.64 | 2000 | |
| 16 | Esteban Loaiza# | 9.60 | 1997 | |
| 17 | Shawn Chacon# | 9.55 | 1991 | |
| 18 | Sam McDowell | 9.45 | 1990 | |
| 19 | Sterling Hitchcock | 9.37 | 1987 | |
| 19 | Jack Sanford# | 9.37 | 1996 | |
| 21 | Scott Sanderson | 9.36 | 1987 | |
| 22 | Scott Sanderson | 9.33 | 1989 | |
| 23 | Paul Erickson# | 9.19 | 2000 | |
| 24 | Kevin Ritz# | 9.18 | 1999 | |
| 25 | Chad Gaudin | 9.13 | 1990 | |
| 26 | Joe Krakauskas | 9.12 | 1984 | |
| 27 | Blake Snell# | 9.00 | 1992 | |
| 27 | Foster Edwards# | 9.00 | 1994 | |
| 29 | Jim Willis | 8.86 | 1985 | |
| 30 | Chad Gaudin | 8.80 | 1981 | |
| 30 | Roy Oswalt# | 8.80 | 1997 | |
| 32 | Jose Rijo# | 8.79 | 1994 | |
| 32 | Robbie Ray | 8.79 | 1987 | |
| 34 | Omar Daal | 8.72 | 1987 | |
| 35 | Sammy Ellis# | 8.66 | 1999 | |
| 36 | Chad Gaudin | 8.64 | 1984 | |
| 36 | Jim York# | 8.64 | 1987 | |
| 38 | Jhoan Duran# | 8.62 | 1998 | |
| 39 | Tony Saunders# | 8.60 | 1988 | |
| 40 | Vern Olsen# | 8.58 | 1995 | |
| 41 | John Montefusco | 8.57 | 1993 | |
| 42 | Luke Weaver# | 8.54 | 1992 | |
| 43 | Blake Snell# | 8.53 | 1996 | |
| 43 | Mark Langston* | 8.53 | 1987 | |
| 43 | Rick Rhoden# | 8.53 | 1995 | |
| 46 | Don Drysdale# | 8.51 | 2000 | |
| 47 | Jhoan Duran# | 8.47 | 1989 | |
| 48 | Phil Niekro | 8.46 | 1985 | |
| 49 | Esteban Loaiza# | 8.44 | 1996 | |
| 50 | Tim Wakefield# | 8.42 | 1992 | |
| 51 | Scott Sanderson | 8.40 | 1986 | |
| 52 | Kyle Freeland# | 8.38 | 1995 | |
| 52 | Dizzy Dean# | 8.38 | 1996 | |
| 54 | Blake Snell# | 8.37 | 1991 | |
| 55 | Jeff Sellers | 8.33 | 1994 | |
| 56 | Reyes Moronta | 8.31 | 1984 | |
| 56 | Daniel Wright | 8.31 | 1991 | |
| 56 | Earl Francis# | 8.31 | 1997 | |
| 56 | John Candelaria# | 8.31 | 1988 | |
| 60 | Paul Moskau | 8.29 | 1982 | |
| 61 | Bill Lee# | 8.27 | 1993 | |
| 62 | Tommy Milone# | 8.22 | 1999 | |
| 62 | Albie Lopez | 8.22 | 1996 | |
| 64 | Art Ceccarelli | 8.18 | 1987 | |
| 64 | Blake Snell# | 8.18 | 1990 | |
| 66 | Blake Snell# | 8.16 | 1993 | |
| 67 | Jim Colborn# | 8.15 | 1999 | |
| 68 | Kip Wells# | 8.04 | 1990 | |
| 69 | Chris Capuano | 7.97 | 1994 | |
| 69 | John Patterson | 7.97 | 1991 | |
| 71 | Jhoan Duran# | 7.94 | 1996 | |
| 71 | Sterling Hitchcock | 7.94 | 1986 | |
| 71 | Daniel Wright | 7.94 | 1992 | |
| 71 | Kyle Lohse# | 7.94 | 1993 | |
| 75 | Robbie Ray | 7.91 | 1980 | |
| 76 | Shawn Chacon# | 7.90 | 1989 | |
| 77 | Steven Matz# | 7.86 | 1994 | |
| 78 | Omar Daal | 7.85 | 1985 | |
| 79 | Art Ceccarelli | 7.78 | 1985 | |
| 80 | Shawn Chacon# | 7.76 | 1988 | |
| 81 | Bill Gullickson# | 7.71 | 1993 | |
| 81 | Ian Snell | 7.71 | 1981 | |
| 83 | Paul Erickson# | 7.68 | 1999 | |
| 84 | Rick Rhoden# | 7.65 | 1998 | |
| 85 | Barry Moore | 7.64 | 1987 | |
| 86 | Matt Guerrier | 7.63 | 1996 | |
| 87 | Jeff Sellers | 7.61 | 1983 | |
| 87 | Ed Hanyzewski# | 7.61 | 1996 | |
| 89 | Kenta Maeda | 7.59 | 1984 | |
| 90 | Sterling Hitchcock | 7.58 | 1985 | |
| 90 | Tom Gordon# | 7.58 | 1996 | |
| 92 | Jakob Junis | 7.55 | 1984 | |
| 93 | Ed Hanyzewski# | 7.52 | 1998 | |
| 94 | Bobby Shantz | 7.51 | 1985 | |
| 95 | Henderson Alvarez III# | 7.50 | 1999 | |
| 95 | Dustin Hermanson# | 7.50 | 1995 | |
| 95 | John Axford# | 7.50 | 1995 | |
| 98 | Len Barker | 7.45 | 1981 | |
| 98 | Joey Hamilton# | 7.45 | 1998 | |
| 100 | Red Witt# | 7.43 | 1994 |
