Harry Thompson
- Given Name
- Harold
- Nickname(s)
- Lefty
- Born
- 9/9/1889 — Nanticoke, PA, USA
- Died
- 2/14/1951 — Reno, NV, USA
- Weight
- 150 lbs
- Height
- 5' 8"
- Throws
- L
- Bats
- L
- Team(s)
- Philadelphia Athletics (1919)Washington Senators (1919)
- Debut
- 1919-04-24
- Final Game
- 1919-06-28