The Saint Mary's Gaels men's basketball team represents Saint Mary's College in Moraga, California, competing in the West Coast Conference of the NCAA. The team plays home games in the University Credit Union Pavilion, capacity 3,500; it is one of the smaller gyms in the WCC. The current head coach is Randy Bennett, who is the school's all-time wins leader. The Gaels have appeared in ten NCAA Tournaments—1959, 1989, 1997, 2005, 2008, 2010, 2012, 2013, 2017, and 2019.
On March 1, 2013, they were placed on probation by the NCAA for four years due to rules violations.
Their two historic rivals are the San Francisco Dons and the Santa Clara Broncos, two other Catholic schools in the San Francisco Bay Area that are in the WCC. More recently, the Saint Mary's Gaels have developed a rivalry with the Gonzaga University Bulldogs of Spokane, Washington.