Redskins' Trent Williams to undergo MRI on injured knee

The Washington Redskins' offensive line took a big hit Thursday night when left tackle Trent Williams exited with a right knee injury that was later diagnosed as a knee strain.

Williams said after the game that there was no ligament damage to his right knee, but he will undergo an MRI on the knee Friday.

Williams said he thought his kneecap popped out of place momentarily before popping back into place, via ESPN.