If Vince Young plays Sunday, we probably won’t know about it until just before kickoff. He’s still nursing a quad injury and veteran Kerry Collins will step in if Young’s out.

Young participated in Friday’s practice but didn’t go full-out.

"I did say early he's a quick healer," Titans coach Jeff Fisher said. "He's been that way. He can overcome some difficult things rather quickly, so we're very optimistic at this point."

To make matters worse for the Titans offense, center Kevin Mawae (left calf) and right guard Benji Olson (back) are both doubtful and Roydell Williams, the club’s top receiver, is out with a broken ankle.

Sending him down the river

The Tennessee Titans have every reason to be worried about a Chargers offense that’s putting up almost 35 points a game over its last three, though San Diego quarterback Philip Rivers seems to be an afterthought.

“[Rivers is] all right,” Titans linebacker Keith Bulluck said. “I feel he had a better season last year. I've been in the game long enough to know that if you have a rushing leader for two years, that helps your offense, and if you have a tight end that big, that helps your offense. I just feel that those two are the players you have to watch. It comes down after that to the quarterback.”

Tennessee held Rivers in check for three quarters the last time the two teams met back in December, but he finished strong to lead the Chargers back to a 23-17 overtime win as 1 ½-point favorites. 

Hug it out

Tempers have cooled since Shawne Merriman accused the Titans of attempting to injure him in last month’s game. Cooled publicly, at least.

"I think the situation of the things happening before was really blown out of proportion, really" Merriman told reporters Wednesday.

"It's going to be a physical game, and not because of what happened the first time.It's going to be a physical game because whoever loses goes home. I think there's more at stake now than it was four games ago."

"We're going to all give each other hugs before the game starts."

San Diego surge

After starting off the year 1-3, the Chargers head into Sunday’s game on a six-game winning streak, both straight up and against the spread. During that stretch they haven’t allowed more than 17 points in any of their wins. Star running back LaDainian Tomlinson had four 100-yard rushing games and six touchdowns on the ground down the stretch. 

Line check

Most books opened with San Diego favored by nine points with the total at 41 points. Since then the betting public has bumped the Chargers up -10 as the total dropped to 39 points at some sportsbooks.