Single Season Records
| Category | Number | Player | Season |
| Batting Average | .444 | Hughie Jennings | 23 |
| Hits | 197 | Hughie Jennings | 23 |
| Doubles | 63 | Kelley, J | 18 |
| Triples | 20 | Hugh Duffy, Ty Cobb | 9, 11 |
| Home Runs | 37 | Babe Ruth | 21 |
| Runs Batted In | 113 | Al Simmons | 12 |
| Stolen Bases | 122 | John McGraw | 13 |
| Walks | 96 | Norm Cash | 9 |
| Runs | 112 | Billy Hamilton | 18 |
| Wins | 19 | Three Fingers Brown | 9 |
| Christy Mathewson | 10 | ||
| Ed Morris | 13 | ||
| Jack Chesbro | 13 | ||
| Earned Run Average | 1.41 | Otto Hess | 15 |
| Strike Outs | 195 | Dwight Gooden | 9 |
| Saves | 30 | Jumbo Davis | 30 |