The Titans didn’t do much on offense with Marcus Mariota sitting out, stumbling to a 16-10 loss to the Dolphins on Sunday at Hard Rock Stadium. Backup quarterback Matt Cassel struggled to move the ball, completing 21 of 32 pass attempts for 141 yards, including an 11-yard touchdown pass to Phillip Supernaw. Cassel also had a long touchdown pass to Delanie Walker wiped out by an offensive pass interference penalty, and a fumble returned for a touchdown. "I think he managed the offense well," Titans coach Mike Mularkey said. "I think there's some throws I know he'd like to have back. There's some throws that I'd like to see our guys make plays for him. I'd like to see us protect a little better. ... Overall, it's the first time he started and played a game since last year." The Titans gained 20 or fewer yards on 13 of 15 possessions. They went three-and-out on eight drives and had negative yardage on three. Cassel was sacked six times. Mariota, who missed the game with a strained hamstring, has not played a full 16-game schedule in any of his three NFL seasons because of injury. The Titans are 1-5 in games that Mariota has missed.