Mildred Kathryn Earp (October 7, 1925 – 2017), nicknamed Mid or Millie, was an American female pitcher who played from 1947 to 1950 in the All-American Girls Professional Baseball League.
Listed at 5 ft 6 in (1.68 m), 135 lb, she batted and threw right-handed.Earp was a pitcher for the Grand Rapids Chicks in a span of four years.
One of the first successful underhand pitchers in the league, Earp was selected to the All-Star Team in her rookie season, recorded the second best single-season ERA and the second best career ERA in AAGPBL history, and helped Grand Rapids win their first Championship Title.
She also hurled a no-hitter game and ranked between the top 10 in several pitching categories during her short stint in the league.She is part of the AAGPBL permanent display at the Baseball Hall of Fame and Museum at Cooperstown, New York, opened in 1988, which is dedicated to the entire league rather than any individual player.