A sixth-round pick out of LSU in 2014, Mettenberger started 10 games over two seasons. The Titans didn’t win any of those games.
Mettenberger, who has a big arm but limited mobility, completed 60.3 percent of his passes with 12 touchdowns, 14 interceptions and a 75.4 passer rating for the Titans.
But Mettenberger matured as a second-year player, humbled by the team drafting Marcus Mariota second overall and handing him the starting role.
The Titans signed veteran Matt Cassel on the first day of free agency. Cassel and Titans general manager Jon Robinson are connected from time they spent together with the New England Patriots. The Titans also have Alex Tanney on the roster.
The timing of Mettenberger’s dismissal is curious, and it’s unclear if something specific prompted the move.
Mettenberger may have had trade value after a strong 2015 preseason, but his regular-season performance likely diminished that possibility.