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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | K9 | YEAR | Open Postseason Career Leaderboard |
|---|---|---|---|---|
| 1 | Hal Newhouser# | 9.58 | 1945 | |
| 2 | Mort Cooper# | 9.00 | 1944 | |
| 3 | Max Lanier# | 7.63 | 1943 | |
| 4 | Denny Galehouse# | 7.50 | 1944 | |
| 5 | Tommy Bridges# | 6.23 | 1934 | |
| 6 | Schoolboy Rowe# | 6.00 | 1935 | |
| 7 | Bobo Newsom# | 5.88 | 1940 | |
| 8 | Mort Cooper# | 5.62 | 1943 | |
| 9 | Red Ruffing# | 5.60 | 1942 | |
| 10 | Red Ruffing# | 5.50 | 1938 | |
| 11 | Schoolboy Rowe# | 5.06 | 1934 | |
| 12 | Spud Chandler# | 5.00 | 1943 | |
| 13 | Tommy Bridges# | 4.50 | 1935 | |
| 14 | Hank Borowy# | 4.00 | 1945 | |
| 15 | Bucky Walters# | 3.00 | 1940 | |
| 15 | Johnny Beazley# | 3.00 | 1942 | |
| 17 | Claude Passeau# | 1.62 | 1945 |
