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| Name | Mickey Haefner |
| Given Name | Milton Arnold |
| Birth Date | 1912-10-9 |
| Birth City | Lenzburg, IL |
| Height | 5'8" |
| Weight | 160 lbs. |
| Batting Hand | Left |
| Pitching Hand | Left |
| Alive | No |
| Age | 82 |
| Year | Team | Hits | At Bats | Home Runs | Runs Batted | Batting Average | Wins | Losses | # of Pitching Games | Strikeouts | # of Shutouts |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1943 | Washington Senators | 6 | 45 | 0 | 4 | 0.133333 | 11 | 5 | 36 | 65 | 1 |
| 1944 | Washington Senators | 11 | 70 | 0 | 6 | 0.157143 | 12 | 15 | 31 | 86 | 3 |
| 1945 | Washington Senators | 20 | 82 | 0 | 5 | 0.243902 | 16 | 14 | 37 | 83 | 1 |
| 1946 | Washington Senators | 15 | 74 | 0 | 3 | 0.202703 | 14 | 11 | 33 | 85 | 2 |
| 1947 | Washington Senators | 8 | 59 | 0 | 1 | 0.135593 | 10 | 14 | 31 | 77 | 4 |
| 1948 | Washington Senators | 7 | 43 | 0 | 3 | 0.162791 | 5 | 13 | 28 | 45 | 0 |
| 1949 | Chicago White Sox | 5 | 25 | 0 | 1 | 0.2 | 5 | 5 | 19 | 23 | 1 |
| 1949 | Chicago White Sox | 5 | 25 | 0 | 1 | 0.2 | 4 | 6 | 14 | 17 | 1 |
| 1949 | Chicago White Sox | 6 | 23 | 0 | 0 | 0.26087 | 5 | 5 | 19 | 23 | 1 |
| 1949 | Chicago White Sox | 6 | 23 | 0 | 0 | 0.26087 | 4 | 6 | 14 | 17 | 1 |
| 1949 | Washington Senators | 5 | 25 | 0 | 1 | 0.2 | 5 | 5 | 19 | 23 | 1 |
| 1949 | Washington Senators | 5 | 25 | 0 | 1 | 0.2 | 4 | 6 | 14 | 17 | 1 |
| 1949 | Washington Senators | 6 | 23 | 0 | 0 | 0.26087 | 5 | 5 | 19 | 23 | 1 |
| 1949 | Washington Senators | 6 | 23 | 0 | 0 | 0.26087 | 4 | 6 | 14 | 17 | 1 |
| 1950 | Boston Braves | 4 | 20 | 0 | 1 | 0.2 | 1 | 6 | 24 | 17 | 0 |
| 1950 | Boston Braves | 4 | 20 | 0 | 1 | 0.2 | 0 | 2 | 8 | 10 | 0 |
| 1950 | Boston Braves | 2 | 7 | 0 | 0 | 0.285714 | 1 | 6 | 24 | 17 | 0 |
| 1950 | Boston Braves | 2 | 7 | 0 | 0 | 0.285714 | 0 | 2 | 8 | 10 | 0 |
| 1950 | Chicago White Sox | 4 | 20 | 0 | 1 | 0.2 | 1 | 6 | 24 | 17 | 0 |
| 1950 | Chicago White Sox | 4 | 20 | 0 | 1 | 0.2 | 0 | 2 | 8 | 10 | 0 |
| 1950 | Chicago White Sox | 2 | 7 | 0 | 0 | 0.285714 | 1 | 6 | 24 | 17 | 0 |
| 1950 | Chicago White Sox | 2 | 7 | 0 | 0 | 0.285714 | 0 | 2 | 8 | 10 | 0 |
| Year | Position | Errors | Double Plays | Assists |
|---|---|---|---|---|
| 1943 | Pitcher | 0 | 3 | 31 |
| 1944 | Pitcher | 1 | 5 | 45 |
| 1945 | Pitcher | 3 | 1 | 53 |
| 1946 | Pitcher | 3 | 2 | 36 |
| 1947 | Pitcher | 0 | 3 | 27 |
| 1948 | Pitcher | 1 | 2 | 38 |
| 1949 | Pitcher | 1 | 0 | 26 |
| 1949 | Pitcher | 2 | 3 | 17 |
| 1950 | Pitcher | 0 | 2 | 10 |
| 1950 | Pitcher | 0 | 1 | 4 |