Originally written on Pro Sports Daily  |  Last updated 12/24/12
San Francisco 49ers wide receiver Mario Manningham will undergo an MRI on his left knee after being injured in Sunday's loss to the Seattle Seahawks. The team did not announce when the MRI will take place, but it will likely occur by Wednesday as the team returns to practice for this Sunday's regular season finale and final tuneup for the playoffs against the visiting Phoenix Cardinals. Manningham was tackled by Seattle's Leroy Hill, causing him to fumble the ball and then to leave the game. Manningham was seen leaving the 49ers locker room with a pronounced limp. He's not the only 49er to have medical concerns. Tight end Vernon Davis suffered a concussion in Sunday's game and will spend much of this week going through the NFL's concussion protocol before it's determined whether he can play or not on Sunday. And the status of defensive lineman Justin Smith, who missed Sunday's game with a lingering elbow injury, is uncertain. All San Francisco coach Jim Harbaugh would say ab...
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