Matt Cassel will stay on board as Marcus Mariota‘s backup. The Titans announced that they have agreed to terms with the quarterback on an extension. It’s a two-year deal, according to Terry McCormick of TitanInsider.com (on Twitter). He’ll get $5.25MM with $2.75MM in 2017, Ian Rapoport of NFL.com (on Twitter). 
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Cassel was called on to start late last season when Mariota went down with a fractured fibula. In four games, the veteran completed 30-of-51 passes for 284 yards, with two touchdowns against two interceptions.
Cassel could be asked to lead the first team offense in practice this summer if Mariota is slow to recover, but the early word is that the youngster is doing just fine.
“I feel pretty good about it,’’ coach Mike Mularkey said of Mariota’s timetable. “You have to trust the doctor’s words, and if you know Marcus like we do, we believe with the way he goes about his business he’ll be prepared. He is not going to overdo it, he has been told to be careful, and be smart about it. Our No.1 goal is to make sure he is under center when we open up opening day. I am not going to put a timeframe on when that first practice or when that first (OTA) will be. I can’t do that because every player is different in how they recover, and it’s difficult to do.”