William Stanley Mazeroski (born September 5, 1936) is an American former baseball second baseman who played 17 seasons in Major League Baseball (MLB) for the Pittsburgh Pirates from 1956 to 1972 and hit one of the iconic home runs in major league history, a dramatic ninth-inning blast that beat the heavily favored New York Yankees in the 1960 World Series and remains the only so-called walk-off home run in a Game 7 of the World Series. ESPN ranked the World Series winner at the top of its list of 100 Greatest Home Runs of All Time, while Sports Illustrated had it eighth on its compilation of 100 Greatest Moments in Sports History.