Tennessee Titans quarterback Marcus Mariota is not expected to play Sunday against the Miami Dolphins after being considered a game-time decision with a hamstring injury, a source told ESPN's Adam Schefter.
Matt Cassel, who replaced Mariota in last week's loss to the Houston Texans, will start in the third-year pro's absence.
The Titans' chances take a major hit without Mariota, as Cassel completed just 4-of-10 passes last week, throwing two interceptions and losing one fumble. Running backs Derrick Henry and DeMarco Murray will be expected to see an increase in their workload with Cassel under center.
