George Felix Kopacz (born February 26, 1941) is an American former first baseman in Major League Baseball who played for the Atlanta Braves (1966) and the Pittsburgh Pirates (1970). Listed at 6 ft 1 in (1.85 m) and 195 lb (88 kg), Kopacz batted and threw left-handed.
In his two MLB trials, Kopacz was a .120 hitter (3-for-25) with one run scored in 16 games. He did not have any extra base hits and did not drive in a run. However, he played 14 seasons (1960–1973) of minor league baseball and in 1970 he was the Most Valuable Player of the Triple-A International League, with a batting average of .310, 29 home runs and 115 RBI.