| 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 |
| John | Cassidy | John P. | 1855 | 0 | 0 | Brooklyn | USA | 68 | 168 | 36 | R | L |
| Year | Team | AB | HR | RBI | BA |
|---|---|---|---|---|---|
| 1875 | Brooklyn Atlantics | 166 | 1 | 6 | 0.1747 |
| 1875 | New Haven Elm Citys | 22 | 0 | 1 | 0.1364 |
| 1876 | Hartford Dark Blues | 47 | 0 | 8 | 0.2766 |
| 1877 | Hartford Dark Blues | 251 | 0 | 27 | 0.3785 |
| 1878 | Chicago White Stockings | 256 | 0 | 29 | 0.2656 |
| 1879 | Troy Trojans | 37 | 0 | 1 | 0.1892 |
| 1880 | Troy Trojans | 352 | 0 | 29 | 0.2528 |
| 1881 | Troy Trojans | 370 | 1 | 11 | 0.2216 |
| 1882 | Troy Trojans | 121 | 0 | 9 | 0.1736 |
| 1883 | Providence Grays | 366 | 0 | 42 | 0.2377 |
| 1884 | Brooklyn Atlantics | 433 | 2 | 0 | 0.2517 |
| 1885 | Brooklyn Grays | 221 | 1 | 28 | 0.2127 |
| Year | Team | W | L | G | SHO |
|---|---|---|---|---|---|
| 1875 | Brooklyn Atlantics | 1 | 20 | 30 | 0 |
| 1875 | New Haven Elm Citys | 1 | 20 | 30 | 0 |
| 1876 | Hartford Dark Blues | 0 | 0 | 0 | 0 |
| 1877 | Hartford Dark Blues | 1 | 1 | 2 | 0 |
| 1878 | Chicago White Stockings | 0 | 0 | 0 | 0 |
| 1879 | Troy Trojans | 0 | 0 | 0 | 0 |
| 1880 | Troy Trojans | 0 | 0 | 0 | 0 |
| 1881 | Troy Trojans | 0 | 0 | 0 | 0 |
| 1882 | Troy Trojans | 0 | 0 | 0 | 0 |
| 1883 | Providence Grays | 0 | 0 | 0 | 0 |
| 1884 | Brooklyn Atlantics | 0 | 0 | 0 | 0 |
| 1885 | Brooklyn Grays | 0 | 0 | 0 | 0 |
| Year | Team | POS | E | DP | A |
|---|---|---|---|---|---|
| 1875 | Brooklyn Atlantics | 1B | 9 | 2 | 1 |
| 1875 | Brooklyn Atlantics | 2B | 0 | 0 | 3 |
| 1875 | Brooklyn Atlantics | OF | 5 | 1 | 1 |
| 1875 | Brooklyn Atlantics | P | 19 | 1 | 49 |
| 1875 | New Haven Elm Citys | 1B | 1 | 4 | 1 |
| 1876 | Hartford Dark Blues | 1B | 2 | 3 | 2 |
| 1876 | Hartford Dark Blues | OF | 0 | 0 | 2 |
| 1877 | Hartford Dark Blues | OF | 22 | 2 | 16 |
| 1877 | Hartford Dark Blues | P | 1 | 0 | 2 |
| 1878 | Chicago White Stockings | C | 0 | 0 | 1 |
| 1878 | Chicago White Stockings | OF | 28 | 6 | 30 |
| 1879 | Troy Trojans | 1B | 3 | 2 | 1 |
| 1879 | Troy Trojans | OF | 1 | 0 | 1 |
| 1880 | Troy Trojans | 2B | 2 | 0 | 0 |
| 1880 | Troy Trojans | OF | 20 | 1 | 18 |
| 1881 | Troy Trojans | OF | 24 | 0 | 20 |
| 1881 | Troy Trojans | SS | 1 | 1 | 4 |
| 1882 | Troy Trojans | 3B | 19 | 0 | 21 |
| 1882 | Troy Trojans | OF | 6 | 1 | 2 |
| 1883 | Providence Grays | 1B | 2 | 0 | 1 |
| 1883 | Providence Grays | 2B | 1 | 0 | 2 |
| 1883 | Providence Grays | OF | 23 | 2 | 26 |
| 1884 | Brooklyn Atlantics | 3B | 5 | 0 | 5 |
| 1884 | Brooklyn Atlantics | OF | 27 | 5 | 25 |
| 1884 | Brooklyn Atlantics | SS | 2 | 0 | 1 |
| 1885 | Brooklyn Grays | OF | 12 | 3 | 7 |