| Bull Wagner | |
| Position: | Pitcher |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 25 December 1887 |
| Birth Place: | Lilley, Michigan |
| Death Place: | Muskegon, Michigan |
| Debutleague: | MLB |
| Debutdate: | June 2 |
| Debutyear: | 1913 |
| Debutteam: | Brooklyn Superbas |
| Finalleague: | MLB |
| Finaldate: | May 30 |
| Finalyear: | 1914 |
| Finalteam: | Brooklyn Robins |
| Statleague: | MLB |
| Stat1label: | Win–loss record |
| Stat1value: | 4–3 |
| Stat2label: | Earned run average |
| Stat2value: | 5.64 |
| Stat3label: | Strikeouts |
| Stat3value: | 15 |
| Teams: | |
William George Wagner (December 25, 1887 – October 2, 1967) was a pitcher in Major League Baseball. He pitched from 1913 to 1914.