George Hartley McQuinn (May 29, 1910 – December 24, 1978) was an American former professional baseball player who played in Major League Baseball (MLB) as a first baseman for four teams, from 1936 through 1948. He was an All-Star for six seasons. He threw and batted left-handed.
McQuinn was born in Arlington, Virginia and attended Washington-Lee High School.
During his 12-year MLB playing career, McQuinn played for the Cincinnati Reds (1936), St. Louis Browns (1938–45), Philadelphia Athletics (1946) and New York Yankees (1947–48). He was selected for the American League All-Star team six times (MLB cancelled the 1945 All-Star Game and no All-Stars were named that season).
In 1938, McQuinn had a .324 career-high batting average with 12 home runs, 42 doubles, 100 runs and 82 runs batted in (RBIs). In 1939, his batting average was .316 with 101 runs scored, 94 RBIs, 37 doubles, 13 triples and 20 home runs. The following year he had 39 doubles, 10 triples and 16 home runs. In 1944, his opening-game home run gave the Browns their first victory and was their only home run in a World Series game.
In 1947, at the age of 36, McQuinn hit .304 with 13 home runs and 80 RBIs, and was nominated for the MVP Award. He retired at the end of the 1948 season.
McQuinn had a career batting average of .276, and a total of 135 home runs and 794 RBIs in 1550 games. After retiring, he was a manager for the Quebec Braves in the farm system of the Boston Braves/Milwaukee Braves, and scouted for the Washington Senators and Montreal Expos.
He was inducted into the Arlington Sports Hall of Fame in 1958 and the Virginia Sports Hall of Fame in 1978. He died in Alexandria, Virginia at the age 68.