What's happend to the San Diego Chargers?  

its because san diego have a crap offensive line and lt cant break into the open field because of it

I myself did think the Chargers were going to win their division this year. The main reason I believe they have not done well is because of their defense. Even with Shawn Merriman I predicted in my preseason preview this year that their defense would not be very good. Now without Merriman it is even worse. I did think however that their offense would be able to carry them to double digit wins, but they did have some injuries on the offensive line early on, as well as RB Ladianian Tomlinson not being healthy and WR Chris Chambers also missing some time. However, I believe Norv Turner, their new head coach also must take some blame. TE Antonio Gates has not been as big a part of the offense as he should be, and Chambers has virtually disappeared since coming back from being injured. Turner had this team throwing the ball way too much, but I guess some of that had to do with them being down in games where you would have to throw the ball more. However, when you have LT at RB, you need to run the ball more, especially to keep your defense off the field, because as I said, teams have not had alot of trouble scoring on them this season. Darren Sproles is no slouch at RB either, and although the owner says Turner's job is not in trouble, if I were a Chargers fan I know I would want him out!