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Highest strikeout rate vs left-handed batters. Every line below is one player-season against left-handed batters, computed from Retrosheet play-by-play event data (1912-2025). 21,491 player-seasons meet the qualifier; the board shows the all-time top 60 plus the top 20 of every era so each era filter has rows.
Showing 172 of 172 ranked seasons
| # | Player | Year | Team | K rate | AVG vs | K rate | HR | BB | BF |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Edwin Diaz | 2018 | SEA | 54.0% | .144 | 54.0% | 1 | 12 | 126 |
| 2 | Ernesto Frieri | 2012 | SDN | 52.1% | .095 | 52.1% | 2 | 14 | 119 |
| 3 | Craig Kimbrel | 2017 | BOS | 50.8% | .178 | 50.8% | 4 | 8 | 118 |
| 4 | Felix Bautista | 2023 | BAL | 50.5% | .120 | 50.5% | 2 | 14 | 107 |
| 5 | Craig Kimbrel | 2012 | ATL | 50.0% | .116 | 50.0% | 1 | 9 | 122 |
| 6 | Josh Hader | 2018 | MIL | 48.0% | .090 | 48.0% | 1 | 11 | 102 |
| 7 | Clayton Kershaw | 2009 | LAN | 46.8% | .173 | 46.8% | 1 | 11 | 154 |
| 8 | Michael Kopech | 2021 | CHA | 46.2% | .176 | 46.2% | 5 | 7 | 117 |
| 9 | Dellin Betances | 2017 | NYA | 45.8% | .122 | 45.8% | 0 | 13 | 120 |
| 10 | Mason Miller | 2024 | OAK | 45.5% | .146 | 45.5% | 3 | 9 | 112 |
| 11 | Craig Kimbrel | 2021 | CHN | 45.0% | .143 | 45.0% | 3 | 7 | 109 |
| 12 | Carlos Marmol | 2010 | CHN | 44.7% | .130 | 44.7% | 1 | 25 | 150 |
| 13 | Jonathan Papelbon | 2007 | BOS | 44.4% | .104 | 44.4% | 3 | 11 | 126 |
| 14 | Will Smith | 2014 | MIL | 44.3% | .167 | 44.3% | 2 | 10 | 106 |
| 15 | Jacob deGrom | 2021 | NYN | 44.2% | .128 | 44.2% | 4 | 6 | 156 |
| 16 | Edwin Diaz | 2019 | NYN | 44.1% | .193 | 44.1% | 5 | 13 | 102 |
| 17 | Liam Hendriks | 2021 | CHA | 43.9% | .133 | 43.9% | 5 | 3 | 132 |
| 18 | Gerrit Cole | 2019 | HOU | 43.6% | .175 | 43.6% | 17 | 30 | 417 |
| 19 | Dellin Betances | 2016 | NYA | 43.2% | .233 | 43.2% | 2 | 10 | 132 |
| 20 | David Robertson | 2017 | CHA|NYA | 43.1% | .140 | 43.1% | 3 | 9 | 116 |
| 21 | Matt Barnes | 2019 | BOS | 43.1% | .174 | 43.1% | 3 | 22 | 116 |
| 22 | Brad Hand | 2018 | SDN | 42.9% | .155 | 42.9% | 3 | 7 | 112 |
| 23 | Jacob deGrom | 2022 | NYN | 42.9% | .165 | 42.9% | 5 | 4 | 119 |
| 24 | Jason Grilli | 2012 | PIT | 42.7% | .168 | 42.7% | 1 | 14 | 117 |
| 25 | Jordan Romano | 2021 | TOR | 42.6% | .140 | 42.6% | 2 | 7 | 101 |
| 26 | Joaquin Benoit | 2010 | TBA | 42.3% | .144 | 42.3% | 4 | 6 | 104 |
| 27 | Matt Thornton | 2010 | CHA | 42.3% | .175 | 42.3% | 2 | 6 | 104 |
| 28 | Kenley Jansen | 2016 | LAN | 42.3% | .191 | 42.3% | 2 | 6 | 123 |
| 29 | Rob Dibble | 1992 | CIN | 42.1% | .180 | 42.1% | 2 | 22 | 152 |
| 30 | Cody Allen | 2014 | CLE | 42.1% | .141 | 42.1% | 3 | 10 | 140 |
| 31 | Jonathan Broxton | 2009 | LAN | 41.9% | .138 | 41.9% | 2 | 15 | 148 |
| 32 | Oliver Perez | 2004 | PIT | 41.7% | .216 | 41.7% | 3 | 6 | 144 |
| 33 | Edwin Diaz | 2025 | NYN | 41.6% | .158 | 41.6% | 3 | 12 | 137 |
| 34 | Garrett Crochet | 2024 | CHA | 41.6% | .247 | 41.6% | 1 | 8 | 101 |
| 35 | Alan Embree | 2002 | SDN | 41.5% | .156 | 41.5% | 3 | 8 | 106 |
| 36 | Clayton Kershaw | 2013 | LAN | 41.5% | .165 | 41.5% | 2 | 11 | 171 |
| 37 | Craig Kimbrel | 2014 | ATL | 41.4% | .147 | 41.4% | 1 | 13 | 133 |
| 38 | Dellin Betances | 2018 | NYA | 41.4% | .200 | 41.4% | 4 | 8 | 111 |
| 39 | Andres Munoz | 2022 | SEA | 41.3% | .157 | 41.3% | 2 | 8 | 126 |
| 40 | Gerrit Cole | 2018 | HOU | 41.1% | .162 | 41.1% | 7 | 38 | 389 |
| 41 | Ryan Pressly | 2022 | HOU | 41.0% | .178 | 41.0% | 3 | 7 | 100 |
| 42 | Koji Uehara | 2013 | BOS | 40.9% | .115 | 40.9% | 1 | 6 | 137 |
| 43 | Kirby Yates | 2019 | SDN | 40.9% | .197 | 40.9% | 2 | 8 | 132 |
| 44 | David Robertson | 2011 | NYA | 40.8% | .156 | 40.8% | 0 | 19 | 142 |
| 45 | Craig Kimbrel | 2011 | ATL | 40.8% | .157 | 40.8% | 1 | 16 | 147 |
| 46 | Chad Green | 2018 | NYA | 40.6% | .234 | 40.6% | 4 | 6 | 143 |
| 47 | John Candelaria | 1983 | PIT | 40.5% | .174 | 40.5% | 2 | 2 | 111 |
| 48 | David Robertson | 2018 | NYA | 40.2% | .176 | 40.2% | 6 | 10 | 132 |
| 49 | Tyler Thornburg | 2016 | MIL | 40.2% | .130 | 40.2% | 1 | 11 | 112 |
| 50 | Shane Bieber | 2020 | CLE | 40.1% | .153 | 40.1% | 1 | 11 | 142 |
| 51 | Cade Smith | 2025 | CLE | 40.1% | .159 | 40.1% | 3 | 9 | 142 |
| 52 | Sid Fernandez | 1985 | NYN | 40.0% | .163 | 40.0% | 2 | 7 | 100 |
| 53 | B. J. Ryan | 2004 | BAL | 40.0% | .094 | 40.0% | 2 | 8 | 115 |
| 54 | Jonny Venters | 2010 | ATL | 40.0% | .198 | 40.0% | 1 | 10 | 115 |
| 55 | B. J. Ryan | 2003 | BAL | 39.8% | .177 | 39.8% | 0 | 13 | 113 |
| 56 | Paco Rodriguez | 2013 | LAN | 39.8% | .130 | 39.8% | 1 | 9 | 113 |
| 57 | Robbie Ray | 2017 | ARI | 39.8% | .216 | 39.8% | 5 | 6 | 123 |
| 58 | Jhoan Duran | 2023 | MIN | 39.8% | .205 | 39.8% | 0 | 14 | 128 |
| 59 | Bob Veale | 1966 | PIT | 39.7% | .206 | 39.7% | 1 | 8 | 151 |
| 60 | Patrick Corbin | 2019 | WAS | 39.7% | .190 | 39.7% | 2 | 13 | 151 |
| 61 | Juan Rincon | 2004 | MIN | 39.4% | .149 | 39.4% | 3 | 14 | 137 |
| 62 | Rob Dibble | 1991 | CIN | 39.3% | .197 | 39.3% | 2 | 14 | 191 |
| 63 | Dennys Reyes | 1999 | CIN | 39.1% | .234 | 39.1% | 2 | 18 | 115 |
| 64 | Bob Veale | 1965 | PIT | 38.5% | .182 | 38.5% | 0 | 15 | 205 |
| 65 | Steve Kline | 1999 | MON | 38.0% | .194 | 38.0% | 1 | 12 | 108 |
| 66 | Felix Rodriguez | 2000 | SFN | 37.9% | .158 | 37.9% | 0 | 19 | 153 |
| 67 | Trevor Hoffman | 1997 | SDN | 37.7% | .185 | 37.7% | 3 | 9 | 167 |
| 68 | Robb Nen | 2000 | SFN | 37.6% | .193 | 37.6% | 3 | 11 | 133 |
| 69 | Felix Rodriguez | 2001 | SFN | 37.4% | .149 | 37.4% | 2 | 15 | 131 |
| 70 | Mark Wohlers | 1996 | ATL | 37.3% | .197 | 37.3% | 3 | 13 | 150 |
| 71 | Mickey Lolich | 1966 | DET | 36.2% | .204 | 36.2% | 4 | 13 | 163 |
| 72 | Sam McDowell | 1968 | CLE | 36.1% | .150 | 36.1% | 1 | 14 | 227 |
| 73 | Mel Rojas | 1996 | MON | 36.1% | .147 | 36.1% | 2 | 13 | 144 |
| 74 | Duane Ward | 1991 | TOR | 36.0% | .193 | 36.0% | 3 | 21 | 211 |
| 75 | Rob Dibble | 1989 | CIN | 36.0% | .186 | 36.0% | 1 | 25 | 200 |
| 76 | Pedro Martinez | 2001 | BOS | 36.0% | .216 | 36.0% | 4 | 14 | 253 |
| 77 | Tom Hall | 1970 | MIN | 35.9% | .129 | 35.9% | 2 | 19 | 145 |
| 78 | Bobby Ayala | 1994 | SEA | 35.7% | .219 | 35.7% | 1 | 14 | 129 |
| 79 | Eric Gagne | 2003 | LAN | 35.5% | .130 | 35.5% | 1 | 13 | 155 |
| 80 | Joe Nathan | 2005 | MIN | 35.5% | .158 | 35.5% | 4 | 15 | 138 |
| 81 | Troy Percival | 1997 | ANA | 35.3% | .235 | 35.3% | 2 | 13 | 119 |
| 82 | Brad Lidge | 2004 | HOU | 35.3% | .191 | 35.3% | 3 | 13 | 190 |
| 83 | Bryan Harvey | 1991 | CAL | 35.2% | .183 | 35.2% | 4 | 11 | 176 |
| 84 | Matt Mantei | 1999 | FLO|ARI | 35.2% | .159 | 35.2% | 4 | 31 | 145 |
| 85 | Sandy Koufax | 1964 | LAN | 35.1% | .164 | 35.1% | 2 | 9 | 151 |
| 86 | Sandy Koufax | 1960 | LAN | 34.8% | .165 | 34.8% | 3 | 26 | 155 |
| 87 | Hal Woodeshick | 1963 | HOU | 34.8% | .146 | 34.8% | 0 | 8 | 138 |
| 88 | Bruce Sutter | 1977 | CHN | 34.8% | .169 | 34.8% | 1 | 13 | 178 |
| 89 | John Wetteland | 1993 | MON | 34.8% | .175 | 34.8% | 3 | 18 | 198 |
| 90 | Mickey Lolich | 1964 | DET | 34.6% | .168 | 34.6% | 4 | 16 | 214 |
| 91 | Mickey Lolich | 1969 | DET | 34.5% | .144 | 34.5% | 4 | 12 | 177 |
| 92 | Rob Dibble | 1990 | CIN | 33.8% | .185 | 33.8% | 1 | 24 | 204 |
| 93 | Art Fowler | 1961 | LAA | 33.6% | .248 | 33.6% | 5 | 11 | 125 |
| 94 | Sandy Koufax | 1965 | LAN | 33.5% | .145 | 33.5% | 5 | 11 | 230 |
| 95 | Mike Paul | 1968 | CLE | 33.3% | .180 | 33.3% | 4 | 10 | 114 |
| 96 | Paul Assenmacher | 1991 | CHN | 33.3% | .179 | 33.3% | 1 | 10 | 147 |
| 97 | Duane Ward | 1993 | TOR | 33.1% | .211 | 33.1% | 2 | 18 | 142 |
| 98 | Bruce Sutter | 1979 | CHN | 33.0% | .170 | 33.0% | 0 | 13 | 197 |
| 99 | Lee Smith | 1989 | BOS | 32.9% | .223 | 32.9% | 5 | 17 | 140 |
| 100 | Ryne Duren | 1959 | NYA | 32.8% | .190 | 32.8% | 3 | 27 | 128 |
| 101 | John Wetteland | 1992 | MON | 32.8% | .200 | 32.8% | 3 | 21 | 201 |
| 102 | Mitch Williams | 1987 | TEX | 32.7% | .146 | 32.7% | 3 | 25 | 153 |
| 103 | Tom Henke | 1987 | TOR | 32.6% | .172 | 32.6% | 3 | 12 | 181 |
| 104 | Gary Peters | 1967 | CHA | 32.3% | .193 | 32.3% | 3 | 10 | 201 |
| 105 | Bryan Harvey | 1993 | FLO | 32.3% | .132 | 32.3% | 0 | 9 | 133 |
| 106 | Bob Veale | 1964 | PIT | 32.2% | .168 | 32.2% | 1 | 19 | 208 |
| 107 | Bryan Harvey | 1990 | CAL | 32.1% | .208 | 32.1% | 1 | 21 | 131 |
| 108 | Dave LaRoche | 1976 | CLE | 32.0% | .165 | 32.0% | 0 | 12 | 122 |
| 109 | Steve Hamilton | 1962 | WS2 | 31.8% | .185 | 31.8% | 3 | 11 | 148 |
| 110 | Rod Beck | 1993 | SFN | 31.8% | .180 | 31.8% | 6 | 11 | 176 |
| 111 | Bob Veale | 1969 | PIT | 31.7% | .273 | 31.7% | 2 | 14 | 167 |
| 112 | Sandy Koufax | 1962 | LAN | 31.6% | .158 | 31.6% | 1 | 14 | 174 |
| 113 | Herb Score | 1956 | CLE | 31.2% | .126 | 31.2% | 3 | 26 | 186 |
| 114 | Sam McDowell | 1970 | CLE | 31.1% | .180 | 31.1% | 7 | 19 | 206 |
| 115 | Mickey Lolich | 1965 | DET | 31.1% | .177 | 31.1% | 2 | 14 | 212 |
| 116 | Bill Henry | 1959 | CHN | 30.5% | .249 | 30.5% | 6 | 5 | 187 |
| 117 | Ryne Duren | 1958 | NYA | 29.2% | .191 | 29.2% | 0 | 17 | 113 |
| 118 | Herb Score | 1955 | CLE | 29.0% | .186 | 29.0% | 4 | 41 | 186 |
| 119 | Lindy McDaniel | 1960 | SLN | 28.7% | .192 | 28.7% | 3 | 10 | 216 |
| 120 | Marshall Bridges | 1959 | SLN | 28.4% | .235 | 28.4% | 3 | 10 | 102 |
| 121 | Bill Henry | 1958 | CHN | 27.9% | .218 | 27.9% | 1 | 4 | 129 |
| 122 | Herb Score | 1959 | CLE | 26.8% | .173 | 26.8% | 5 | 34 | 168 |
| 123 | Bobby Shantz | 1958 | NYA | 26.4% | .159 | 26.4% | 0 | 7 | 121 |
| 124 | Sandy Koufax | 1957 | BRO | 26.4% | .248 | 26.4% | 7 | 15 | 125 |
| 125 | Harvey Haddix | 1957 | PHI | 26.1% | .196 | 26.1% | 2 | 10 | 161 |
| 126 | Jack Meyer | 1955 | PHI | 26.1% | .190 | 26.1% | 5 | 30 | 188 |
| 127 | Jack Meyer | 1958 | PHI | 25.7% | .271 | 25.7% | 2 | 13 | 148 |
| 128 | Dick Littlefield | 1956 | PIT|SLN|NY1 | 24.8% | .198 | 24.8% | 5 | 18 | 145 |
| 129 | Billy Hoeft | 1956 | DET | 24.5% | .236 | 24.5% | 3 | 17 | 245 |
| 130 | Billy O'Dell | 1960 | SFN | 24.5% | .200 | 24.5% | 1 | 16 | 200 |
| 131 | Harvey Haddix | 1958 | CIN | 24.2% | .182 | 24.2% | 3 | 21 | 178 |
| 132 | Harvey Haddix | 1960 | PIT | 24.1% | .229 | 24.1% | 2 | 8 | 158 |
| 133 | Dutch Leonard | 1914 | BOS | 22.3% | .175 | 22.3% | 0 | 17 | 265 |
| 134 | Walter Johnson | 1912 | WS1 | 21.2% | .227 | 21.2% | 1 | 45 | 593 |
| 135 | Dazzy Vance | 1925 | BRO | 21.0% | .251 | 21.0% | 5 | 26 | 471 |
| 136 | Dave Danforth | 1922 | SLA | 20.9% | .297 | 20.9% | 1 | 13 | 115 |
| 137 | Dutch Ruether | 1921 | BRO | 20.5% | .257 | 20.5% | 2 | 15 | 195 |
| 138 | Ferdie Schupp | 1919 | NY1|SLN | 20.4% | .159 | 20.4% | 0 | 14 | 103 |
| 139 | Jakie May | 1926 | CIN | 20.3% | .203 | 20.3% | 0 | 2 | 143 |
| 140 | Eddie Plank | 1914 | PHA | 19.9% | .296 | 19.9% | 0 | 11 | 216 |
| 141 | Smoky Joe Wood | 1913 | BOS | 19.9% | .230 | 19.9% | 0 | 36 | 277 |
| 142 | Ferdie Schupp | 1916 | NY1 | 19.9% | .163 | 19.9% | 1 | 7 | 136 |
| 143 | Bob Weiland | 1938 | SLN | 19.9% | .267 | 19.9% | 3 | 20 | 296 |
| 144 | Johnny Vander Meer | 1939 | CIN | 19.9% | .279 | 19.9% | 1 | 18 | 156 |
| 145 | Bump Hadley | 1931 | WS1 | 19.8% | .227 | 19.8% | 2 | 41 | 318 |
| 146 | Hippo Vaughn | 1914 | CHN | 19.7% | .184 | 19.7% | 0 | 27 | 244 |
| 147 | Slim Sallee | 1916 | SLN|NY1 | 19.4% | .211 | 19.4% | 1 | 6 | 160 |
| 148 | Lee Grissom | 1937 | CIN | 19.3% | .219 | 19.3% | 3 | 32 | 342 |
| 149 | Hippo Vaughn | 1917 | CHN | 19.2% | .232 | 19.2% | 1 | 12 | 245 |
| 150 | Lefty Tyler | 1916 | BSN | 19.0% | .190 | 19.0% | 0 | 22 | 242 |
| 151 | Al Mamaux | 1915 | PIT | 18.9% | .199 | 18.9% | 0 | 49 | 381 |
| 152 | Rube Bressler | 1914 | PHA | 18.9% | .236 | 18.9% | 0 | 13 | 164 |
| 153 | Cy Blanton | 1935 | PIT | 18.9% | .223 | 18.9% | 0 | 33 | 397 |
| 154 | Bob Feller | 1937 | CLE | 18.9% | .255 | 18.9% | 1 | 44 | 265 |
| 155 | Bill Hallahan | 1930 | SLN | 18.7% | .256 | 18.7% | 6 | 23 | 267 |
| 156 | Max Lanier | 1941 | SLN | 18.5% | .224 | 18.5% | 1 | 21 | 200 |
| 157 | Hal Newhouser | 1940 | DET | 18.5% | .305 | 18.5% | 4 | 17 | 146 |
| 158 | Lefty Williams | 1916 | CHA | 18.4% | .294 | 18.4% | 2 | 23 | 288 |
| 159 | Bob Feller | 1940 | CLE | 18.4% | .227 | 18.4% | 6 | 56 | 560 |
| 160 | Lefty Grove | 1931 | PHA | 18.3% | .237 | 18.3% | 4 | 19 | 350 |
| 161 | Bill Walker | 1930 | NY1 | 18.3% | .248 | 18.3% | 7 | 21 | 301 |
| 162 | Bob Feller | 1939 | CLE | 18.3% | .229 | 18.3% | 9 | 68 | 542 |
| 163 | Johnny Vander Meer | 1941 | CIN | 18.3% | .225 | 18.3% | 4 | 56 | 252 |
| 164 | Lefty Gomez | 1933 | NYA | 18.1% | .227 | 18.1% | 3 | 32 | 348 |
| 165 | Howard Mills | 1939 | SLA | 18.1% | .235 | 18.1% | 5 | 38 | 249 |
| 166 | Lefty Tyler | 1914 | BSN | 18.0% | .201 | 18.0% | 2 | 23 | 233 |
| 167 | Hippo Vaughn | 1918 | CHN | 17.7% | .189 | 17.7% | 1 | 17 | 265 |
| 168 | Ed Walsh | 1912 | CHA | 17.7% | .240 | 17.7% | 3 | 37 | 633 |
| 169 | Art Nehf | 1917 | BSN | 17.7% | .243 | 17.7% | 0 | 5 | 198 |
| 170 | Jeff Tesreau | 1914 | NY1 | 17.6% | .212 | 17.6% | 4 | 64 | 483 |
| 171 | Hippo Vaughn | 1915 | CHN | 17.4% | .271 | 17.4% | 2 | 11 | 242 |
| 172 | Rube Marquard | 1916 | BRO | 17.2% | .197 | 17.2% | 1 | 9 | 163 |
Single seasons with 100+ batters faced vs left-handed batters (event-derived Retrosheet splits).
The splits come from Retrosheet play-by-play event data, aggregated per player, season and opposing hand. Rates are the plain formulas computed from the split counts themselves: AVG is hits per at-bat, OBP is (H+BB+HBP)/(AB+BB+HBP+SF), SLG is total bases per at-bat. The OPS boards rank by split OPS+, normalized against what the player's league hit against that same hand that season (the same recipe as our position leaderboards, applied to splits; never park-adjusted). Rate boards rank raw rates, so compare across eras using the era filter.
Split leaderboards have no official qualification rule, so the qualifiers are ours and disclosed on every board: 100 PA vs left-handed pitching (200 vs right-handed) for hitter rate boards, 10 HR vs the hand for home-run boards, and 100 batters faced vs the hand for pitcher boards. Players whose careers fall outside 1912-2025 coverage have no split lines anywhere on this site.
Browse every board on the platoon split leaderboard hub, or see a player's own career and season splits on their career page.