On Sunday, CU associate athletic director David Plati said Evans, who left the stadium in an ambulance, is scheduled to undergo surgery on Monday at University of Colorado Hospital in Aurora. Evans will be hospitalized until Thursday.
Plati said Evans' status for the 2017 season won't be known until after surgery. Plati added that Evans was in good spirits when head coach Mike MacIntyre visited him on Sunday morning, and that Evans' parents are coming to Colorado to be with him.
A 5-foot-6, 175-pound junior, Evans is from San Jose, Calif. He came to CU was a walk-on in 2014, and was awarded a scholarship last fall.
Last season, Evans was the primary back-up to starter Phillip Lindsay. Evans rushed for 346 yards and three touchdowns and caught eight passes for 114 yards.
Without Evans, the Buffs have just four scholarship running backs for the second half of spring ball, and that includes senior Donovan Lee, who has been practicing at cornerback.
Lindsay is back for his senior year, and senior Michael Adkins II gives the Buffs another experienced back.
In addition to the three seniors, the Buffs have sophomore Beau Bisharat in the backfield. Walk-ons Tanner Grzesiek and Riley Hillis are also practicing.
This summer, the Buffs are slated to add true freshman Alex Fontenot to the backfield.
Contact staff writer Brian Howell at howellb@dailycamera.