It was used for American football games at both the professional and collegiate level. The stadium was the home of the Los Angeles Bulldogs, the first professional football team in Los Angeles. The Bulldogs competed as an independent team before joining the second American Football League in 1937 and winning its championship with a perfect 8–0–0 record, the first professional football team to win its championship with an unblemished record. After the collapse of the league, the Bulldogs returned to being an independent team before joining the American Professional Football Association in 1939. The Bulldogs then became charter members of the Pacific Coast Professional Football League in 1940 and played in Gilmore Stadium until 1948, when the team moved to Long Beach, California, for its (and the league's) final season. The stadium was also home to another professional football team, the Los Angeles Mustangs of the Pacific Coast Professional Football League. Gilmore Stadium was the site of two 1940 National Football League (NFL) Pro Bowls.