| Billy Kelsey | |
| Position: | Catcher |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | August 24, 1881 |
| Birth Place: | Covington, Ohio |
| Death Place: | Springfield, Ohio |
| Debutleague: | MLB |
| Debutdate: | October 4 |
| Debutyear: | 1907 |
| Debutteam: | Pittsburgh Pirates |
| Finalleague: | MLB |
| Finaldate: | October 6 |
| Finalyear: | 1907 |
| Finalteam: | Pittsburgh Pirates |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .400 |
| Stat2label: | Home runs |
| Stat2value: | 0 |
| Stat3label: | Run batted in |
| Stat3value: | 0 |
| Teams: | |
George William Kelsey (August 24, 1881 – April 24, 1968), was a professional baseball player for the 1907 Pittsburgh Pirates. He later was a manager in the Texas League in 1909 and the Western Association in 1915.