Mario Manningham WR SF 12 Months
Mario Manningham will undergo an MRI on his left knee Monday.
X-rays came back negative for a fracture on Sunday, but that doesn't tell us much. We'd be much more concerned about a ligament tear. If Manningham is unavailable for the NFL playoffs, the 49ers will have to lean on Randy Moss and keep first-round pick A.J. Jenkins active on game days.