San Francisco 49ers star running back Christian McCaffrey has been taken to the locker room during Sunday Night Football in a snowy Orchard Park, New York against the Buffalo Bills.

McCaffrey took a handoff early in the second quarter in the cold and wintry conditions when he appeared to suffer some kind of injury in his leg.

He slid on the snowy surface at Highmark Stadium and was later piled on by multiple Bills players. 

McCaffrey was able to walk off the field under his own power and then went with medical staff into the blue tent, then to the locker room.

According to team officials, McCaffrey has suffered a knee injury and is questionable to return.

It’s unclear exactly which leg was the one that was injured – as two competing theories have since surfaced as to when McCaffrey hurt his knee.

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