Yeah, I'm not sure if it was the play calling or Palmer, but he turned into Captain Checkdown after a while... and then when he's throw deep WRs weren't hanging on.
Current league leader in receptions in the NFL: Darren McFadden with 13. Runners up have only 9.
Amazing to me the SD defense didn't do more to explicitly cover DMC, not that the absurd broadcast team would have picked up on anything like that and talked about it.
I think it may have been Palmer that lost faith in the WRs OR he was trying to make up for all the games he did not have McFadden last year.