Hugh Daily (July 17, 1847 – after 1923), nicknamed "One Arm" Daily, was an Irish born professional right-handed pitcher who played six seasons, for seven different teams; the Buffalo Bisons, the Cleveland Blues, and the St. Louis Maroons of the National League, Chicago Browns and Washington Nationals of the Union Association, and the Cleveland Blues of the American Association.

In 1883 and 1884, he won 20 or more games each season, while finishing in the top ten among league leaders in major pitching categories such as earned run average (as calculated retroactively, since E.R.A.

While this behaviour was not well liked by the baseball establishment, he was popular with the home crowds because of his verbal tirades against umpires and opposing players alike.

[4] Some theories attempt to explain Daily's tempestuous behaviour, one of which was put forth by Frank Vaccaro in his 1999 edition of The National Pastime.

[6] His physical condition did not allow him many opportunities to play any other positions, so this compelled his managers to leave him in the game longer, even when his performance was declining.

[5] He was playing for the Cleveland Blues of the National League when he pitched a no-hitter on 13 September 1883 against the Philadelphia Quakers, a 1–0 victory.

Daily struck out a total of 483 batters that season, a record that was surpassed only in 1886 by both Matt Kilroy (513), and Toad Ramsey (499).

[11] Unofficially, his reported 19 strikeout game was upgraded to 20[12] when it was discovered that one batter had struck out but reached first base when the pitch got away from the catcher.

The rest of his career included short stints with the 1886 Washington Nationals, and the 1887 Cleveland Blues of the American Association.