Tennessee Titans rookie quarterback and former LSU signal caller Zach Mettenberger was the victim of a sucker punch over the weekend at a bar in Nashville. 

According to The Tennessean, someone said 'Roll Tide' to Mettenberger while he was out at Loser's Bar and Grill near the campus of Vanderbilt University. The owner of the bar had this explanation of the incident.

"Here's the truth: The guy said something about 'Roll Tide!' to Zach, and Zach turned around and said 'Good luck with that,'" owner Steve Ford told The Tennessean. "And the guy's buddy then sucker-punched Zach.

Employees working the door chased down the alleged puncher but no charges were filed by anyone involved.

"It is what it is and it's over. No one is pressing charges," Ford told The Tennessean. "It shouldn't have happened to begin with. The guy said 'Roll Tide.' He tried to provoke him. But Zach did not throw one punch, period. I was standing right next to him."

Mettenberger finished his career at LSU with a 19-6 record as a starter before being drafted in the sixth round of the 2014 NFL Draft. The Titans begin training camp on Friday.