A Monday night report from CBSSports.com's Jason La Canfora casts some doubt on the situation.
Carson Palmer trade not finalized. Things "hit a snag" according to a source. Unsure if it can be overcome at this point ...- Jason La Canfora (@JasonLaCanfora) April 1, 2013
Palmer still is on the books for $13 million with the Raiders this season. If he's insistent on being paid anywhere near that figure, that could explain the "snag."
Palmer would represent a substantial upgrade at the quarterback position on the Cardinals, but it's been some time since he's been a player worth his current salary.
Follow Dan Hanzus on Twitter @DanHanzus.