Mettenberger had released his pass -- a 7-yard completion to Kendall Wright -- before Watt drove the rookie into the turf. Watt was not flagged for the hit, though he certainly could have been.
Watt and Mettenberger have some history. After Mettenberger's first career start last month, Watt criticized the quarterback for his social media presence in the days after being named Tennessee's starter.
"I take this game seriously," Watt said at the time. "If I were a rookie being named a starter for the first time, I'd be a little more focused."
What other game-day injuries are we following?