Asomugha was hurt in the second quarter Thursday night on a pass intended for Seattle receiver Mike Williams.
Asomugha defended the pass but on his way down appeared to hit the back of his head on Williams' knee, then hit the ground very hard. Asomugha was motionless on the field for a few moments before getting up and walking off under his own power. The team said he was questionable to return.
Backup Philadelphia safety Colt Anderson injured his left knee injury covering a punt. The team said Anderson would not return.