Cornerback Rashean Mathis is done for the season, the latest Jaguar to go down in a season that has been as downhill as it could be for the club. Mathis hurt his right knee in Monday nights loss to the Texans. “It’s not going to require surgery, but they need to let it heal properly,” coach Jack Del Rio said today. “He’ll be immobilized for a couple of weeks, and by the time they get him going again, we’re going to run out of time. So he’ll not be available the rest of the season.” Veteran Drayton Florence will go back into the starting lineup for Mathis. “Obviously, Rashean’s a fine football player, one of our top players,” Del Rio said. “We’ll miss him.”