Elmer Clinton "Gloomy Gus" Henderson was an American football coach. He served as the head coach at the University of Southern California (1919–1924), the University of Tulsa (1925–1935), and Occidental College (1940–1942), compiling a career college football record of 126–42–7. Henderson's career winning percentage of .865 at USC is the best of any Trojans football coach, and his 70 wins with the Tulsa Golden Hurricane remain a team record. In between his stints at Tulsa and Occidental, Henderson moved to the professional ranks, helming the Los Angeles Bulldogs of the American Football League in 1937 and the Detroit Lions of the National Football League (NFL) in 1939. Henderson also coached basketball and baseball at USC, each for two seasons.

The USC Trojans football program represents University of Southern California in the sport of American football. The Trojans compete in the Football Bowl Subdivision (FBS) of the National Collegiate Athletic Association (NCAA) and the Big Ten Conference.