John Wesley "Jack" Coombs (November 18, 1882 – April 15, 1957), nicknamed "Colby Jack" after his alma mater, was a pitcher in Major League Baseball who played with the Philadelphia Athletics (1906–1914), Brooklyn Robins (1915–1918), and Detroit Tigers (1920). Coombs set a number of records in the American League and World League which stand to this day, and, when he won 31 games while losing nine in 1910, he became one of only 13 pitchers to win 30 games in a season since 1900.