TJ Watt goes down with scary-looking knee injury

This is no question the last thing the Pittsburgh Steelers wanted to see on Sunday going up against the Detroit Lions. In the middle of the action, star pass-rusher T.J. Watt sacked Jared Goff, but went down to the turf in pain.

Watt got his knee bent in a way it's not supposed to. You could tell just how much agony he was in.

That doesn't look good for the Steelers and Watt. If this indeed is a serious knee injury for the superstar player, it'll be a massive blow for Pittsburgh. Watt is no doubt one of the best defensive players in the league.