Bill Stemmyer
- Given Name
- William
- Nickname(s)
- Cannon Ball, Cannonball
- Born
- 5/6/1865 — Cleveland, OH, USA
- Died
- 5/3/1945 — Cleveland, OH, USA
- Weight
- 190 lbs
- Height
- 6' 2"
- Throws
- R
- Bats
- R
- Team(s)
- Boston Beaneaters (1885–1887)Cleveland Blues (1888)
- Debut
- 1885-10-03
- Final Game
- 1888-06-15