I think I mentioned this up thread already, but I'll reiterate. A day or 2 after the trade, there was a radio interview of someone in the Cardinals organization, forget who it was, who claimed Johnson struggled mightily with picking up the offense. Said that Carson Palmer had to literally tell Johnson what to do, where to line up, etc. on almost every play. Result, solid rookie season behind Chris Johnson, then an All-Pro season the next. Without Palmer in his ear, and injuries haven't helped, he hasn't been the same.
If that's true, and Johnson is now coming to this complicated AF OB offense that takes 3 years to get down........