Hank O'Day
- Given Name
- Henry M.
- Nickname(s)
- The Reverend
- Born
- 7/8/1859 — Chicago, IL, USA
- Died
- 7/2/1935 — Chicago, IL, USA
- Weight
- 180 lbs
- Height
- 6' 0"
- Throws
- R
- Bats
- R
- Team(s)
- Toledo Blue Stockings (1884)Pittsburg Alleghenys (1885)Washington Nationals (1886–1889)New York Giants (1889–1890)
- Debut
- 1884-05-02
- Final Game
- 1890-10-03
20-Loss Seasons
1888 · Washington NationalsW16L29ERA3.1WHIP1.181
1884 · Toledo Blue StockingsW9L28ERA3.75WHIP1.228
1887 · Washington NationalsW8L20ERA4.17WHIP1.429