SAN FRANCISCO — Wide receiver Mario Manningham is done for the season after tearing the ACL and PCL in his left knee during Sunday night’s 42-13 loss to the Seahawks, multiple sources reported last night.

Manningham, already bothered by a shoulder injury, limped out of the 49ers’ locker room yesterday on crutches. The former Giant had an MRI exam yesterday.

Manningham was injured in the third quarter Sunday when he was tackled low by Leroy Hill and fumbled.