Mora's fourth season in 2015 saw the arrival of freshman quarterback Josh Rosen, a rash of injuries, and erratic play by the offense. The Bruins finished 8–5, including a loss to Nebraska in the Foster Farms Bowl.
In Mora's fourth year at UCLA in 2015, they welcomed freshman quarterback Josh Rosen, experienced a string of injuries, and saw their offense struggle.  The Bruins ended up with an 8-5 record, including a defeat against Nebraska in the Foster Farms Bowl.