Alfonzo John "A. J." Sturzenegger (August 22, 1888 – April 8, 1949), sometimes also referred to as Jack Sturzenegger, was an American football and baseball player and coach. He played college football and baseball at the University of Nebraska. He later served as an assistant football coach at the University of Michigan (1920–1923), University of Southern California (1924), and UCLA (1925–1948). He was also the head coach of the UCLA Bruins baseball team from 1927 to 1931, in 1933, and again from 1943 to 1945.