Quarterback Tua Tagovailoa was injured late in the 2nd quarter of Miami’s game with Buffalo on Sunday.

The former Alabama standout looked at the time as if he might have suffered a concussion, but he returned to the game after halftime and helped the Dolphins to a 21-19 victory.

During the 2nd half of the game, NFL reporter Ian Rapoport tweeted that he was told that Tagovailoa “tweaked his back in the 1st quarter on a sneak and didn’t miss time. After the Matt Milano hit, his back locked up — leading to him wobbling. Into the locker room for a full concussion check. Fully cleared.”

It appears, however, that the NFL Players Association will investigate the incident to see if it was handled properly.

Tagovailoa passed for 186 yards and a touchdown in the victory.

The 3-0 Dolphins return to action on Thursday night at Cincinnati.