J.J. Watt rips Zach Mettenberger for posting selfies

After Texans defensive end J.J. Watt sacked Titans quarterback Zach Mettenberger for the second time on Sunday afternoon, he celebrated by taking a mock selfie of himself. Watt wasn’t just making a comment on the ubiquity of self-shot photographs. He was mocking Mettenberger for posting pictures of himself last week before and after he trimmed…