J.J. Watt mocks Zach Mettenberger's selfies: It's 'not high school'

J.J. Watt is a busy guy, getting ready to dominate each week for the Houston Texans, but he still paid attantion to Tennessee Titans rookie quarterback Zach Mettenberger's social media accounts.

Mettenberger posted a few selfies of himself before and after getting his long hair cut after he was named starter. He did keep his glorious moustache, and added another selfie to his Twitter account on Sunday morning before playing the Texans.

Now, this has nothing to do with Watt really, but he took it personally anyway.

Watt sacked Mettenberger and his celebration was taking a selfie of himself and the fallen Mettenberger. And he had a lecture for Mettenberger after the Texans' 30-16 win.

Mettenberger struggled for much of his first start, though his final numbers were strong. He completed 27-of-41 passes for 299 yards, two touchdowns and one interception. Both touchdowns came after Houston took a 27-3 lead. Mettenberger didn't sound like he had any regrets, via ESPN.com.

Watt is not known for having fun, off the field anyway. He has said in interviews he doesn't go out and party because of his dedication to football. If Watt thinks that Mettenberger wasn't focused on his job enough this week that helped him and the Texans, but for Watt it's about more than that. Hear the rest of what he had to say:

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Frank Schwab is the editor of Shutdown Corner on Yahoo Sports. Have a tip? Email him at shutdowncorner@yahoo.com or follow him on Twitter! Follow @YahooSchwab