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| Player Name | Given Name | Birth Date | Birth Place | Height | Weight | Bat Hand | Throw Hand | Deceased Date | Deceased Age | |
|---|---|---|---|---|---|---|---|---|---|---|
| Jeff Pfeffer | Edward Joseph | 3/4/1888 | Seymour IL, USA | 6'3" | 210 | Right | Right | 8/15/1972 | 84 |
| Year | Team Name | Hits | Bats | Homeruns | RBI | Batting AVG | Wins | Loses | Total Games | Strikeouts | Shutouts | Position | Errors | Double Plays | Assists |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1911 | St. Louis Browns | 0 | 4 | 0 | 0 | 0.0000 | 0 | 0 | 2 | 4 | 0 | Pitcher | 0 | 0 | 2 |
| 1913 | Brooklyn Superbas | 0 | 7 | 0 | 0 | 0.0000 | 0 | 1 | 5 | 13 | 0 | Pitcher | 0 | 1 | 6 |
| 1914 | Brooklyn Robins | 23 | 116 | 0 | 6 | 0.1983 | 23 | 12 | 43 | 135 | 3 | Pitcher | 2 | 3 | 65 |
| 1915 | Brooklyn Robins | 27 | 106 | 0 | 8 | 0.2547 | 19 | 14 | 40 | 84 | 6 | Pitcher | 2 | 0 | 62 |
| 1916 | Brooklyn Robins | 34 | 122 | 0 | 12 | 0.2787 | 25 | 11 | 41 | 128 | 6 | Off Field | 0 | 0 | 0 |
| 1917 | Brooklyn Robins | 13 | 100 | 0 | 6 | 0.1300 | 11 | 15 | 30 | 115 | 3 | Pitcher | 3 | 3 | 66 |
| 1918 | Brooklyn Robins | 1 | 4 | 0 | 0 | 0.2500 | 1 | 0 | 1 | 1 | 1 | Off Field | 0 | 0 | 0 |
| 1919 | Brooklyn Robins | 20 | 97 | 0 | 6 | 0.2062 | 17 | 13 | 30 | 92 | 4 | Pitcher | 4 | 0 | 69 |
| 1920 | Brooklyn Robins | 18 | 74 | 0 | 8 | 0.2432 | 16 | 9 | 30 | 80 | 2 | Pitcher | 0 | 0 | 4 |
| 1921 | Brooklyn Robins | 0 | 11 | 0 | 0 | 0.0000 | 1 | 5 | 6 | 8 | 0 | Pitcher | 5 | 3 | 78 |
| 1921 | St. Louis Cardinals | 4 | 29 | 0 | 1 | 0.1379 | 9 | 3 | 18 | 22 | 1 | Pitcher | 3 | 2 | 47 |
| 1922 | St. Louis Cardinals | 24 | 98 | 0 | 12 | 0.2449 | 19 | 12 | 44 | 83 | 1 | Pitcher | 0 | 1 | 9 |
| 1923 | St. Louis Cardinals | 7 | 55 | 0 | 2 | 0.1273 | 8 | 9 | 26 | 32 | 1 | Pitcher | 1 | 0 | 20 |
| 1924 | Pittsburgh Pirates | 3 | 26 | 0 | 1 | 0.1154 | 4 | 5 | 16 | 20 | 0 | Pitcher | 1 | 3 | 65 |
| 1924 | St. Louis Cardinals | 6 | 25 | 0 | 0 | 0.2400 | 5 | 3 | 15 | 19 | 0 | Pitcher | 1 | 2 | 31 |