Updated: August 30, 2012, 12:02 PM ET
Mike Ehrmann/Getty Images JOHN CLAYTON QB RANKING (7): After a slow start, Philip Rivers turned it on late in 2011. He threw for 12 TD passes against only three interceptions in San Diego's last six games.

Expert Picks (Consensus: second)

Intelligence Report

Five things you need to know about the Chargers:

1. New blood: The Chargers added more than a dozen veteran free agents to the roster. It was an interesting approach for a team that needed to bring in some new life after missing the playoffs the past two seasons. Under Smith, the Chargers haven't been big spenders in free agency. This year, they didn't add any huge names, but they added several good players in every facet. Several key San Diego players, such as Rivers and safety Eric Weddle, said seeing all the new faces has given the team a fresh approach.

2. Offensive line needs health: Rivers struggled for the first 10 games last season, and a big reason why was incredible flux on the offensive line created by injuries. San Diego played a whopping 13 offensive linemen last season and was pulling players off the street and onto the line. The unit settled down late last season and played better. If left tackle Jared Gaither has a solid season, it should go a long way toward ensuring improved play from this unit.

3. Antonio Gates, circa 2007? Future Hall of Fame tight end Antonio Gates has been the talk of Chargers camp. He is finally healthy after dealing with foot-related injuries for the past four years. Gates has lost five pounds and looks terrific. Teammates say it's the best Gates has looked in five years. Gates performed well despite his injuries even though he barely practiced. Now that Gates, 32, has totally regained his health, it will be interesting to see if he can dominate again.

4. Another rookie of the year? Last year, Broncos pass-rusher Von Miller won the NFL Defensive Rookie of the Year Award after the 2011 No. 2 overall pick recorded 11.5 sacks. Early in the offseason, Miller worked with South Carolina pass-rusher Melvin Ingram. Shortly afterward, Ingram was taken by the Chargers with the No. 18 pick. I wouldn't be shocked if Ingram follows in his friend's footsteps and wins the same award Miller did last season. The Chargers are going to unleash Ingram and let him use his immense skills. I expect an instant impact from Ingram.

5. It's Mathews' time: The Chargers are hoping for Mathews to hurry back from a shoulder injury that he suffered in the first preseason game. His could miss a game or two, but when he returns Mathews will be expected to carry a big load. This is the third NFL season for Mathews. He has progressively improved and made the Pro Bowl last season after he rushed for 1,091 yards and averaged an impressive 4.9 yards per carry. He is going to be given the opportunity to run the ball 25 times a game, catch several balls out of the backfield, play in short yardage and perhaps be the third-down back. Mathews is going to be busy.

-- Bill Williamson, ESPN.com

Inside The Numbers

Rivers had the highest Total QBR (94.4) of any quarterback in the NFL over the last five games of the season. After a tough start to the season, Rivers excelled throwing downfield the last five weeks (62.3 completion percentage, 8-2 TD-INT ratio).

• Rivers will be throwing to new targets this season, with Vincent Jackson and Mike Tolbert leaving in free agency. During the 2011-12 season, Rivers targeted Jackson on 113 throws and Tolbert on 73, which ranked first and third on the team. However, Jackson and Tolbert also accounted for 12 drops last year on their 186 targets. The rest of the team had six drops combined in 354 targets, with no individual receiver dropping more than a pass.

• Mathews found success running behind fullback Jacob Hester last season. Mathews had eight rushes of at least 20 yards out of multiple-back formations, tied with Ray Rice and Frank Gore for most in the NFL. With Tolbert leaving for Carolina, Mathews' workload is likely to increase. Mathews must take better care of the ball, as his five fumbles last season tied with Cedric Benson for most in the NFL.

• The Chargers will miss Tolbert in red zone situations. Tolbert had eight of San Diego's 15 rushing touchdowns in the red zone last season. Since 2008, Tolbert has 13 rushing touchdowns at or inside the 3-yard line, tied for eighth-most in the NFL over that span.

-- ESPN Stats & Information

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