Pittsburgh Steelers running back James Conner left in the fourth quarter of Thursday's 52-21 victory over the Carolina Panthers on Thursday night after suffering a concussion.
Coach Mike Tomlin told reporters after the game that Conner is in the concussion protocol.
Conner was briefly examined in the sideline medical tent during the third quarter after taking a hit on a play. He later returned to the game before leaving for the locker room with the Steelers leading, 52-14, early in the fourth quarter.
The second-year running back tallied 65 yards and a touchdown on 13 carries before exiting the game. Conner has 771 rushing yards and 10 TDs on the season.