The Ducks have not yet determined a timetable for his return.
Brooks was in a walking boot and was seen by Oregon's medical staff Friday. He suffered the injury late in the first half of Thursday's game when he appeared to collide with a teammate. At the start of the second half, he remained in the locker room.
A 6-foot-7 junior forward, Brooks missed three games earlier this season after undergoing surgery on his left foot. The injury forced him to miss the team's offseason trip to Spain.
Brooks, who led Oregon to the Elite Eight last year, is averaging 13.6 points per game this season.