Stanislaw Leo "Steve" Kuczek (December 28, 1924 – November 21, 2010) was an American professional baseball player. A late-season callup to the 1949 Boston Braves, he became one of only 84 players in the history of Major League Baseball to sport a career 1.000 batting average. He was born in Amsterdam, New York, and played baseball in high school, as well as at Colgate University and in the United States Army, in which he served during World War II.