| Home | Teams and Players | Homerun Kings | Top Salaries | Top RBIs | Hall of Fame |
| First Name | Last Name | Given Name | Birth Year | Birth Month | Birth Day | Birth City | Birth Country | Height | Weight | Age | Bats | Throws |
| Kaiser | Wilhelm | Irvin Key | 1877 | 1 | 26 | Wooster | USA | 72 | 162 | 59 | R | R |
| Year | Team | AB | HR | RBI | BA |
|---|---|---|---|---|---|
| 1903 | Pittsburgh Pirates | 34 | 0 | 0 | 0.0882 |
| 1904 | Boston Beaneaters | 100 | 0 | 3 | 0.0700 |
| 1905 | Boston Beaneaters | 100 | 0 | 4 | 0.1600 |
| 1908 | Brooklyn Superbas | 111 | 0 | 3 | 0.1081 |
| 1909 | Brooklyn Superbas | 57 | 0 | 4 | 0.2281 |
| 1910 | Brooklyn Superbas | 19 | 0 | 2 | 0.3158 |
| 1914 | Baltimore Terrapins | 84 | 0 | 8 | 0.2500 |
| 1915 | Baltimore Terrapins | 0 | 0 | 0 | 0.0000 |
| 1921 | Philadelphia Phillies | 2 | 0 | 0 | 0.0000 |
| Year | Team | W | L | G | SHO |
|---|---|---|---|---|---|
| 1903 | Pittsburgh Pirates | 5 | 3 | 12 | 1 |
| 1904 | Boston Beaneaters | 14 | 20 | 39 | 3 |
| 1905 | Boston Beaneaters | 3 | 23 | 34 | 0 |
| 1908 | Brooklyn Superbas | 16 | 22 | 42 | 6 |
| 1909 | Brooklyn Superbas | 3 | 13 | 22 | 1 |
| 1910 | Brooklyn Superbas | 3 | 7 | 15 | 0 |
| 1914 | Baltimore Terrapins | 12 | 17 | 47 | 1 |
| 1915 | Baltimore Terrapins | 0 | 0 | 1 | 0 |
| 1921 | Philadelphia Phillies | 0 | 0 | 4 | 0 |
| Year | Team | POS | E | DP | A |
|---|---|---|---|---|---|
| 1903 | Pittsburgh Pirates | OF | 0 | 0 | 2 |
| 1903 | Pittsburgh Pirates | P | 2 | 2 | 33 |
| 1904 | Boston Beaneaters | P | 7 | 3 | 90 |
| 1905 | Boston Beaneaters | OF | 1 | 0 | 0 |
| 1905 | Boston Beaneaters | P | 5 | 2 | 77 |
| 1908 | Brooklyn Superbas | P | 6 | 3 | 109 |
| 1909 | Brooklyn Superbas | P | 6 | 0 | 56 |
| 1910 | Brooklyn Superbas | P | 1 | 0 | 24 |
| 1914 | Baltimore Terrapins | P | 4 | 1 | 82 |
| 1915 | Baltimore Terrapins | P | 0 | 0 | 0 |
| 1921 | Philadelphia Phillies | P | 0 | 0 | 1 |