Titans' quarterback Vince Young rested his strained right quadriceps by watching practice Wednesday, leaving the work to backup Kerry Collins. Young hurt his leg Sunday in the third quarter of a 13-10 loss to Tampa Bay as he sprinted to the sideline on a 2-yard gain. The Titans gave Young an MRI on Monday to determine how to treat the muscle, and he has been trying to get healthy. But coach Jeff Fisher said Young would be day to day and might not practice this week as the Titans prepare to visit Young's hometown team, Houston.