UCLA forward Travis Wear has been diagnosed with appendicitis.
The fifth-year senior didn't practice Monday and was being treated at a hospital.
A team spokesman says there's no timetable for Wear to return.
Wear averaged 10.9 points and 5.2 rebounds while starting 31 of 32 games last season. He was expected to be a key part of the Bruins' frontcourt again this season.
UCLA opens the season at home against Drexel on Nov. 8.