Hall's emergence makes the trip more interesting (I'll be boarding a plane for Phoenix momentarily).
The Cardinals will have gone through four starting quarterbacks in about 10 months. Kurt Warner retired. Matt Leinart lasted the offseason and two exhibition games as the starter. Derek Anderson lasted two exhibition games and three-plus regular season games.
Hall took over in Week 4. How long will the Cardinals give him? An undrafted rookie free agent will need time to develop. Benching Hall after two or three starts wouldn't seem like much of a long-term plan. But the pressure to win in the short term is always strong.
These situations tend to work themselves out, however. Hall might not hold up physically if he takes as much punishment as the much bigger Anderson has taken this season. He might provide a spark and immediately show signs of developing into at least a solid No. 2 quarterback next season.
The unknown makes this game more appealing than it would have been if Whisenhunt had stuck with Anderson for another week.