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| First Name | Last Name | Given Name | Birth Year | Birth Month | Birth Day | Birth City | Birth Country | Height | Weight | Age | Bats | Throws |
| Bobby | Mathews | Robert T. | 1851 | 11 | 21 | Baltimore | USA | 65 | 140 | 46 | R | R |
| Year | Team | AB | HR | RBI | BA |
|---|---|---|---|---|---|
| 1871 | Fort Wayne Kekiongas | 89 | 0 | 10 | 0.2697 |
| 1872 | Baltimore Canaries | 223 | 0 | 21 | 0.2242 |
| 1873 | New York Mutuals | 223 | 0 | 13 | 0.1928 |
| 1874 | New York Mutuals | 298 | 0 | 30 | 0.2416 |
| 1875 | New York Mutuals | 264 | 0 | 15 | 0.1818 |
| 1876 | New York Mutuals | 218 | 0 | 9 | 0.1835 |
| 1877 | Cincinnati Reds | 59 | 0 | 0 | 0.1695 |
| 1879 | Providence Grays | 173 | 1 | 10 | 0.2023 |
| 1881 | Boston Red Caps | 71 | 0 | 4 | 0.1690 |
| 1881 | Providence Grays | 57 | 0 | 4 | 0.1930 |
| 1882 | Boston Red Caps | 169 | 0 | 13 | 0.2249 |
| 1883 | Philadelphia Athletics | 167 | 0 | 11 | 0.1856 |
| 1884 | Philadelphia Athletics | 184 | 0 | 0 | 0.1848 |
| 1885 | Philadelphia Athletics | 179 | 0 | 12 | 0.1676 |
| 1886 | Philadelphia Athletics | 88 | 0 | 10 | 0.2386 |
| 1887 | Philadelphia Athletics | 25 | 0 | 0 | 0.2000 |
| Year | Team | W | L | G | SHO |
|---|---|---|---|---|---|
| 1871 | Fort Wayne Kekiongas | 6 | 11 | 19 | 1 |
| 1872 | Baltimore Canaries | 25 | 18 | 49 | 0 |
| 1873 | New York Mutuals | 29 | 23 | 52 | 2 |
| 1874 | New York Mutuals | 42 | 22 | 65 | 4 |
| 1875 | New York Mutuals | 29 | 38 | 70 | 2 |
| 1876 | New York Mutuals | 21 | 34 | 56 | 2 |
| 1877 | Cincinnati Reds | 3 | 12 | 15 | 0 |
| 1879 | Providence Grays | 12 | 6 | 27 | 1 |
| 1881 | Boston Red Caps | 4 | 8 | 14 | 1 |
| 1881 | Boston Red Caps | 1 | 0 | 5 | 0 |
| 1881 | Providence Grays | 4 | 8 | 14 | 1 |
| 1881 | Providence Grays | 1 | 0 | 5 | 0 |
| 1882 | Boston Red Caps | 19 | 15 | 34 | 0 |
| 1883 | Philadelphia Athletics | 30 | 13 | 44 | 1 |
| 1884 | Philadelphia Athletics | 30 | 18 | 49 | 3 |
| 1885 | Philadelphia Athletics | 30 | 17 | 48 | 2 |
| 1886 | Philadelphia Athletics | 13 | 9 | 24 | 0 |
| 1887 | Philadelphia Athletics | 3 | 4 | 7 | 0 |
| Year | Team | POS | E | DP | A |
|---|---|---|---|---|---|
| 1871 | Fort Wayne Kekiongas | P | 8 | 2 | 23 |
| 1872 | Baltimore Canaries | 3B | 6 | 0 | 3 |
| 1872 | Baltimore Canaries | OF | 0 | 0 | 0 |
| 1872 | Baltimore Canaries | P | 20 | 2 | 51 |
| 1873 | New York Mutuals | OF | 1 | 0 | 0 |
| 1873 | New York Mutuals | P | 27 | 1 | 58 |
| 1874 | New York Mutuals | 3B | 0 | 1 | 1 |
| 1874 | New York Mutuals | OF | 0 | 0 | 0 |
| 1874 | New York Mutuals | P | 38 | 2 | 101 |
| 1875 | New York Mutuals | OF | 0 | 0 | 0 |
| 1875 | New York Mutuals | P | 29 | 4 | 106 |
| 1876 | New York Mutuals | OF | 0 | 0 | 0 |
| 1876 | New York Mutuals | P | 28 | 0 | 78 |
| 1877 | Cincinnati Reds | OF | 0 | 0 | 0 |
| 1877 | Cincinnati Reds | P | 4 | 0 | 18 |
| 1877 | Cincinnati Reds | SS | 3 | 0 | 1 |
| 1879 | Providence Grays | 3B | 4 | 0 | 2 |
| 1879 | Providence Grays | OF | 7 | 1 | 5 |
| 1879 | Providence Grays | P | 2 | 0 | 39 |
| 1881 | Boston Red Caps | OF | 6 | 0 | 3 |
| 1881 | Boston Red Caps | P | 0 | 0 | 2 |
| 1881 | Providence Grays | OF | 1 | 0 | 0 |
| 1881 | Providence Grays | P | 4 | 2 | 16 |
| 1882 | Boston Red Caps | OF | 5 | 0 | 0 |
| 1882 | Boston Red Caps | P | 6 | 1 | 34 |
| 1882 | Boston Red Caps | SS | 1 | 0 | 0 |
| 1883 | Philadelphia Athletics | OF | 0 | 0 | 0 |
| 1883 | Philadelphia Athletics | P | 12 | 2 | 68 |
| 1884 | Philadelphia Athletics | OF | 0 | 0 | 0 |
| 1884 | Philadelphia Athletics | P | 25 | 1 | 78 |
| 1885 | Philadelphia Athletics | OF | 0 | 0 | 0 |
| 1885 | Philadelphia Athletics | P | 10 | 1 | 67 |
| 1886 | Philadelphia Athletics | OF | 1 | 0 | 0 |
| 1886 | Philadelphia Athletics | P | 8 | 3 | 38 |
| 1887 | Philadelphia Athletics | P | 2 | 1 | 14 |