The UP Fighting Maroons are the collegiate varsity teams of the University of the Philippines Diliman. The teams play in the University Athletic Association of the Philippines (UAAP), the Philippines' premier college sports league.
UP is one of four member-universities that participate in all 15 sporting events of the league.
UP was one of the founding members of the UAAP in 1938. It was also a founding member and the originator of the National Collegiate Athletic Association (NCAA) in the year 1924.
UP is a perennial contender for the overall championship in the UAAP every season. The team last won the UAAP Seniors Overall Championship (now referred to as Collegiate) in the 1997–1998 season, two years before UP last hosted the competitions before its centennial.
The UAAP has eight member-universities and holds tournaments in 13 sports (17 sports disciplines). Only four of the eight member-universities participate in all of the thirteen sports; UP is one of these four.