Pittsburgh Steelers quarterback Ben Roethlisberger was carted off after injuring his left knee on a sack in the third quarter against the St. Louis Rams.
Roethlisberger did not return as the Steelers went on to win 12-6.
ESPN's Adam Schefter reports "Big Ben" is expected to miss at least four weeks and will undergo an MRI.
Ben Roethlisberger expected to miss at least 4 weeks with knee injury, source tells ESPN. He will undergo an MRI Monday; hoping ACL intact.
— Adam Schefter (@AdamSchefter) September 27, 2015
The Steelers and Browns do not play each other for seven weeks.
Safety Mark Barron tripped up Roethlisberger by getting a hand on his leg.
Roethlisberger was 20 for 24 for 192 yards and an interception.
Roethlisberger hasn't missed a game since 2012 when he was out for three games late in the season because of a shoulder injury.
Michael Vick made his first appearance of the season.
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