Cincinnati Bengals cornerback Terence Newman could miss the remainder of the regular season because of a sprained MCL, sources told ESPN Senior NFL Analyst Chris Mortensen.

Newman will miss at least one game and could be sidelined for Cincinnati's remaining three regular-season games, according to sources.

During his news conference earlier Monday, coach Marvin Lewis was vague in discussing Newman's injury. He told attending reporters only, "he's a little sore."

It certainly appeared Newman had a more significant injury than minor soreness.

Immediately after Sunday's 42-28 victory over the Indianapolis Colts, Newman was given a leg brace and crutches. During Monday's open locker room period, the veteran cornerback was still sporting the stiff leg-length brace and crutches.