Williams left Sunday's game against the Vikings with an apparent right leg injury, Courtney Cronin of ESPN.com reports.
Williams' right leg gave out under him as he scrambled to his left toward the end zone in the middle of the fourth quarter. He needed assistance to get to the sideline, and if he's unable to return, he'll finish Week 2 action with 138 yards, no touchdowns and one interception on 15-for-26 passing and five carries for 42 yards.