Stephen Robert Blass (born April 18, 1942) is an American former professional baseball player and television sports color commentator. He played his entire career in Major League Baseball as a right-handed pitcher for the Pittsburgh Pirates in 1964 and from 1966 through 1974. Blass was one of the National League's top pitchers between 1968 and 1972, helping the Pirates win four National League Eastern Division titles in five years between 1970 and 1974. He played a key role in the Pirates victory over the Baltimore Orioles in the 1971 World Series when he recorded two complete game victories. He remains the last National League pitcher to throw a complete game in Game Seven of a World Series. After his playing career ended, Blass had a 34-year career as a television sports commentator for Pittsburgh Pirates games.