The Tennessean's Jim Wyatt first reported the news.
As with those of all picks taken after the first round, Mettenberger's contract is a four-year deal. As the No. 178 overall selection in the 2014 NFL Draft, the quarterback's pact includes a $125,116 signing bonus, per Wyatt.
The 6-foot-5 quarterback slid in the draft partially due to a torn ACL sufferend at the end of his final season at LSU. However, he possesses prototypical size and arm strength that NFL coaches love.
During this weekend's rookie minicamp, Mettenberger -- despite not being able to fully step into throws -- was zipping the ball though a strong crosswind.
However, he'll have to answer questions about his poise and decision-making at the NFL level.