Sandy Koufax, born Sanford Braun on December 30, 1935, in Brooklyn, New York, grew up in a Jewish family. Raised in a neighborhood where many Jewish families lived, Koufax was encouraged to maintain his heritage. He later adopted his stepfather’s last name, Koufax. Despite growing up in a predominantly non-Jewish sport environment, he remained connected to his Jewish roots throughout his life, even famously sitting out a game on Yom Kippur, the holiest day in Judaism, demonstrating his strong commitment to his faith. Koufax excelled in sports from an early age, attending Lafayette High School in Brooklyn before playing college baseball at the University of Cincinnati.