Kenneth Walker will likely sit out UCLA’s upcoming season after undergoing back surgery, the Los Angeles Times reported.

The 5-foot-9 receiver caught 11 passes for 87 yards as a freshman last season, and also returned seven kickoffs for 138 yards. Although he showed encouraging flashes through spring practices, Walker had a tendency to drop catchable passes and wasn’t near the top of the depth chart.

The Bruins return senior Shaq Evans, mentioned in some preseason All-Pac-12 lists after leading UCLA with 877 yards in 2012. Sophomore Jordan Payton took starting reps through spring opposite Evans, while sophomore Devin Fuller has the potential to become a multi-position weapon.