Tennessee quarterback Vince Young took part in most of practice Friday but will be a game-time decision for the Titans' playoff game Sunday against the San Diego Chargers. Coach Jeff Fisher said Young was better but did not go full speed with his sore right quadriceps. "I did say early he's a quick healer," Fisher said of his quarterback. "He's been that way. He can overcome some difficult things rather quickly so we're very optimistic at this point." But the Titans will still test Young on Sunday to make sure he can run around and be close to full speed. "Then we'll make the decision," Fisher said.