Portrait of American professional baseball player Al Rosen, third baseman for the Cleveland Indians, kneeling in the batter’s circle with a bat, 1950s. (Photo by Hulton Archive/Getty Images)
Sandy Koufax, pitcher of the Los Angeles Dodgers, holds up four baseballs in Los Angeles, Ca. on Sept. 10, 1965. It is the day after he pitched a perfect game for a 1-0 win against the Chicago Cubs, making him the first major leaguer to pitch four no-hit games. (AP Photo)