UCLA starting offensive tackle Torian White suffered a broken ankle in the second quarter of the Bruins' 34-27 win over Utah on Thursday.
UCLA head coach Jim Mora said White will be out for an extended period, but did not say that White was out for the rest of the season.
As a redshirt freshman in 2012, White started all 14 games. He had started the first five games of the 2013 season as well.
UCLA is 4-0 and ranked No. 12 in the Associated Press poll.