| Home | Teams and Players | Homerun Kings | Top Salaries | Most Runs Batted In | Hall of Fame |
| Name | Big Jeff Pfeffer |
| Given Name | Francis Xavier |
| Birth Date | 1882-3-31 |
| Birth City | Champaign, IL |
| Height | 6'1" |
| Weight | 185 lbs. |
| Batting Hand | Right |
| Pitching Hand | Right |
| Alive | No |
| Age | 72 |
| Year | Team | Hits | At Bats | Home Runs | Runs Batted | Batting Average | Wins | Losses | # of Pitching Games | Strikeouts | # of Shutouts |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1905 | Chicago Cubs | 8 | 40 | 0 | 3 | 0.2 | 4 | 4 | 15 | 56 | 0 |
| 1906 | Boston Beaneaters | 31 | 158 | 1 | 11 | 0.196203 | 13 | 22 | 35 | 158 | 4 |
| 1907 | Boston Doves | 15 | 60 | 0 | 6 | 0.25 | 6 | 8 | 19 | 65 | 1 |
| 1908 | Boston Doves | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 4 | 3 | 0 |
| 1910 | Chicago Cubs | 3 | 17 | 0 | 2 | 0.176471 | 1 | 0 | 13 | 11 | 0 |
| 1911 | Boston Rustlers | 9 | 46 | 1 | 6 | 0.195652 | 7 | 5 | 26 | 24 | 1 |
| Year | Position | Errors | Double Plays | Assists |
|---|---|---|---|---|
| 1905 | Pitcher | 0 | 0 | 24 |
| 1906 | Outfielder | 1 | 1 | 2 |
| 1906 | Pitcher | 4 | 0 | 91 |
| 1907 | Pitcher | 2 | 0 | 38 |
| 1908 | Pitcher | 0 | 0 | 1 |
| 1910 | Outfielder | 0 | 0 | 0 |
| 1910 | Pitcher | 0 | 0 | 10 |
| 1911 | 1st Base | 0 | 0 | 0 |
| 1911 | Outfielder | 0 | 0 | 0 |
| 1911 | Pitcher | 0 | 0 | 25 |