49ers WR Mario Manningham tore the ACL and PCL in his left knee in Sunday night’s loss to the Seahawks, according to multiple reports.
Manningham left Sunday’s 42-13 loss to the Seahawks after suffering the injury.
In his first season with the 49ers, Manningham played in 12 games with 10 starts and has 42 catches for 449 yards and one touchdown. He is third on the team in receiving yards.
The Niners already lost WR Kyle Williams to an ACL injury earlier this year. TE Vernon Davis suffered a concussion in the loss and will need to be cleared to return to the field.