Travis Wear hurt his right foot in practice on Saturday, making the junior forward doubtful for Sunday's game at crosstown rival Southern California.
Wear is averaging 11.6 points and 5.4 rebounds, having started 25 of the Bruins' 26 games. He leads the team with 29 blocked shots. He missed UCLA's game at Arizona State on Jan. 26 with a concussion.
The Trojans won 75-71 in overtime in the teams' first meeting on Jan. 30 to end a four-game skid against the Bruins. Wear scored 16 points in that game.