The Facts: The Titans believe that quarterback Marcus Mariota will play in Week 4.

Diehards Line:Mariota was forced into last week's game against the Jaguars after Blaine Gabbert was forced to leave with a concussion. Mariota missed the second game due to his elbow injury and is still not 100 percent, but is trending in the right direction to be available this week. He faces an Eagles defense that will not be an easy task.