Bill Clymer
- Given Name
- William Johnston
- Nickname(s)
- Derby Day Bill
- Born
- 12/18/1872 — Philadelphia, PA, USA
- Died
- 12/26/1936 — Philadelphia, PA, USA
- Weight
- 155 lbs
- Height
- 5' 10"
- Team(s)
- Philadelphia Athletics (1891)
- Debut
- 1891-06-25
- Final Game
- 1891-06-27
- Gravesite
- Find-a-Grave