The 31-year-old Johnson hauled in 45 catches for 497 yards and three touchdowns last season, finishing fourth on the team in receptions. He was primed to make starts in the slot alongside Keenan Allen and deep-threat, free-agent pickup Travis Benjamin. Johnson's injury means a bigger role for Benjamin, Dontrelle Inman and veteran tight end Antonio Gates along with a healthy dose of snaps for pass-catching backfield threat Danny Woodhead.