BOULDER, Colo. -- Colorado has lost leading scorer Spencer Dinwiddie for the rest of the season with a knee injury.

The school said on Monday that Dinwiddie, a junior guard, had an ACL injury and will require surgery once the swelling in the knee goes down. Dinwiddie was hurt in a non-contact play during the first half of a 71-54 loss at Washington on Sunday.

Dinwiddie was averaging 14.7 points and 3.1 rebounds for Colorado, which dropped six spots in the latest AP poll. He is also considered the Buffaloes' emotional leader.

The Buffaloes (14-3, 3-1 Pac-12) are off to one of their best starts in school history as they try to make the NCAA tournament for a third consecutive season.