Redskins running back Derrius Guice will reportedly undergo an MRI on Friday, after leaving Thursday night's preseason game with a possible injured knee, according to NFL Network's Ian Rapoport.

Guice left the game in the first quarter against the Patriots after the rookie fell to the ground following an impressive 34-yard run that was negated by a penalty. The rookie walked off the field and was examined by the training staff on the sidelines, where he was later standing and talking with his teammates.