Benjamin exited Sunday's preseason game against the Raiders due to a concussion, Eric Branch of the San Francisco Chronicle reports.
Benjamin thus finishes exhibition season with two catches (on six targets) for 24 yards and one touchdown and three punt returns for 34 yards in three contests. It remains to be seen if he did enough to make the regular-season roster, but due to the banged-up nature of the 49ers' group of wide receivers, he still may remain employed with the team beyond cut-down day Tuesday.