TUCSON, Ariz. -- Derrick Williams scored a career-high 31 points, 19 in the second half, and Arizona rallied from a nine-point deficit to escape with a 73-71 victory over California on Thursday night.
Williams grabbed 12 rebounds and broke his school record for free throw attempts, going 16 of 22.
Down 70-67, California had a chance to tie the game when Arizona's Kevin Parrom fouled freshman Allen Crabbe on a 3-point attempt with 33.5 seconds to play. But Crabbe, an 83-percent free-throw shooter, missed one of the three.
Crabbe led the Bears (7-7, 0-2) with 17 points. Jorge Gutierrez added 14 points and four steals. Fourteen of Gutierrez's family members made the 12-hour drive from Chihuahua, Mexico, to see him, for the first time, play for Cal.
Lamont "Momo" Jones and Jamelle Horne each scored 10 points for Arizona (13-3, 2-1).
Maryland point guard Melo Trimble, considered a lock to leave the program before struggling in the second half last season, has withdrawn from the NBA draft and will return for his junior season.
Louisville's Chinanu Onuaku, who recently underwent a medical procedure to correct a heart rhythm issue detected during the combine, will keep his name in the NBA draft pool.
Andrew White III will return to the Nebraska men's basketball team next season after removing his name from the NBA draft.