Gene William Mauch (November 18, 1925 – August 8, 2005) was an American professional baseball player and manager. He played in Major League Baseball as a second baseman for the Brooklyn Dodgers (1944, 1948), Pittsburgh Pirates (1947), Chicago Cubs (1948–49), Boston Braves (1950–51), St. Louis Cardinals (1952) and the Boston Red Sox (1956–57).
Mauch was best known for managing four teams from 1960 to 1987. He is by far the winningest manager to have never won a league pennant (breaking the record formerly held by Jimmy Dykes), three times coming within a single victory. He managed the Philadelphia Phillies (1960–68), Montreal Expos (1969–75, as their inaugural manager), Minnesota Twins (1976–80), and California Angels (1981–82, 1985–87). His 1,902 career victories ranked 8th in major league history when he retired, and his 3,942 total games ranked 4th. He gained a reputation for playing a distinctive "small ball" style, which emphasized defense, speed and base-to-base tactics on offense rather than power hitting.
Mauch died at age 79 at Eisenhower Medical Center in Rancho Mirage, California from lung cancer.