Both Mariota and Gabbert went through pregame routine on the field Sunday morning, but the former reportedly didn't do much throwing.
Rapoport reported Mariota suffered a pinched nerve in his elbow in last week's loss to the Miami Dolphins. As of Saturday night, the QB had not regained total feeling in his fingers so might not be able to grip the ball well enough to throw much, if at all.
The Titans have just two quarterbacks on the roster after not signing an emergency signal-caller over the weekend, despite Mariota's questionable status entering the day.
With Mariota having trouble gripping the ball, he could be used only on running plays, Rapoport noted.
If Mariota can't properly grip the ball to throw, it will be interesting to see what the Titans offense looks like if Gabbert goes down with an injury. Stay tuned.