BOULDER, Colo. (AP) Colorado senior guard Xavier Johnson underwent surgery to fix his torn left Achilles tendon.
There's no timetable for his return after he suffered the injury in an offseason workout earlier this month, the school announced Thursday.
Coach Tad Boyle said in a statement the Buffaloes are ''looking forward to helping Xavier through this process and getting him back healthy, and help this program win more games.''
The 6-foot-7, 230-pound Johnson averaged 10.3 points and 5.6 rebounds last season.
Colorado begins the season on Nov. 13 against Iowa State in Sioux Falls, South Dakota.