This is what ESPN's Eric Karabell said in todays Relief Pitcher column:
I'm finally convinced Jason Isringhausen is not reclaiming the closer role in St. Louis anytime soon. However, Izzy remains on deck in case Ryan Franklin struggles. Just pretend Izzy is on the DL working through his problems.
I think Izzy has outpitched Franklin since Izzy came off the DL. So the way I read that is if they were going to make a switch they probably would have already done it. My own guess is that if it doesn't happen right after the break it won't as long as Franklin is getting the job done.