Although San Diego looked like a complete team last season, they have a lot of areas to address this offseason. LaDainian Tomlinson is out and it's more than a minute possibility that Sproles will exit by way of free agency.
There are a number of other key position players that may very well part ways with the team in free agency. Vincent Jackson, Malcolm Floyd, Kassim Osgood, Marcus McNeill, and Shawne Merriman are all starters whose contracts have expired.
Biggest Needs: RB, WR, OL
With Tomlinson and Sproles out, it appears San Diego will go after a feature back in the draft and maybe even a wild-card third-down back in free agency. With the 28th pick in the draft and a lush defensive class in April, the Chargers have a legitimate shot at acquiring a decent back to take over for the future.
Jonathan Dwyer of Georgia Tech and Charles Scott of LSU are both quick, bruising backs who could contribute immediately in Norv Turner's style of running. If the front office goes after a veteran feature back in free agency and a developmental back in the draft, Toby Gerhart or Ryan Matthews would be smart picks, too.
Vincent Jackson has been in the news lately for a DUI charge and may not be available immediately at the start of the season. That, paired with the possibility of losing Floyd and Osgood, opens the door for picking up a dynamite wideout in the first or second round.
Damien Williams is the premier route runner in his class, but a guy Brandon LaFell is the big body type Chargers fans have become familiar with. Clemson's Jacoby Ford would provide a great slot option and an honorable replacement as a return man, as well.
The offensive line is one of the key areas to improve upon in the offseason for the Chargers. Nick Hardwick has struggled with injuries and when he isn't on the field, the line really struggles to protect.
Marcus McNeill, should he stay, and Louis Vasquez are both good contributors who are decent starters, but need a rotation behind them in case of a lack of production or injury. A backup for Hardwick is among the few upgrades the front office needs to address.
For the rest of the Chargers team needs, go here.