I thought the Cardinals run game had a chance this year. They drafted one of the more under-rated RB prospects (David Johnson) at a good value, a guy that deserves comparisons to Matt Forte. They brought in Iupati. They seemed to be moving Ellington to his proper 3rd down back role.
But from what I've heard, Johnson has not had a good camp, and it seems likely that no other RB has stepped up. Signing Chris Johnson as a likely starter speaks volumes.
And now Iupati is going to miss 6-8 weeks.
When you have a QB as old and brittle as Palmer, you MUST make the running game your focus. The running game was a huge failure last year, and I commend Arizona for trying to fix it this offseason with some smart moves, but it looks like they can't catch a break.
Watching the Cardinals offense last year felt like watching the late Tim Ruskell years here in Seattle. And if they fail to run the ball again in 2015, they'll be another negative DVOA squad.