UCLA quarterback Ben Olson broke his foot and will be sidelined for at least two months.
Olson, whose career has been marked by injuries, broke the fifth metatarsal in his right foot during practice on Saturday, and X-rays taken Sunday showed the fracture. He suffered the same injury during spring practice.
A decision on whether he will have surgery is expected to be made in a few days.
Kevin Craft, a junior college transfer, and redshirt freshman Chris Forcier are expected to compete for the Bruins' starting job.
Patrick Cowan, who took over when Olson was sidelined by injury last season and was set to be the No. 1 quarterback heading into the season, had surgery after hurting his knee in spring practice and will miss the season.