Fullback Zak Keasey tore a biceps tendon in Week 6 against the Eagles and is expected to miss the rest of the season, the San Francisco Chronicle reports. Tight end Delanie Walker may take over as the primary fullback.
The 49ers worked wide receiver Josh Morgan into the action early during the Week 6 loss to the Eagles. The rookie replaced both Bryant Johnson and Arnaz Battle at times, the San Francisco Chronicle notes. Morgan caught one pass for 25 yards in the game.