I would be just as happy to see Stafford sit this one out. The o-line is in shambles, why risk scrambling his brains further?
Head trauma before you are 100% fukky recovered is exponentially more dangerous. Remember the Tua fiasco? If we are not 110% that #9 could not benefit from more rest, err on the side of caution. Play the long game.
The Cards might well be without their starting QB, as well, which would help level the playing field.
Plus, a more mobile QB might not be a bad thing at present. Perkins and Wolford are better equipped to run for their lives and extend plays to make something out of nothing when the pass protection inevitably breaks down.