Jacksonville running back Fred Taylor aggravated his right hamstring after breaking loose on what could have been a touchdown run in the first quarter against Tennessee. Taylor ran 35 yards before pulling up and limping to the sideline. He tried loosening up his leg by riding a stationary bicycle on the sideline. Team officials first said his return was questionable. But he ran off to the locker room, and a spokesman said he would not return. The veteran running back had only nine carries last week against Indianapolis before straining his hamstring. He did rush for a season-high 131 yards in the first half but sat out the rest of that game. In this game, he had two carries for 37 yards when injured on the Jaguars' second drive of the game.