I know there has been lots of discussion about icing and running on this site. Regardless of your opinion, I would strongly suggest reading the Randy Sullivan article above (if you have not already) just to see a well constructed argument, apparently with pretty decent support, as to why icing might impede recovery. The one thing I will note on lots of icing protocols is for the ice to be applied repeatedly for shorter periods of time. This practice would seem to completely circumvent the "flooding" effect of longer periods of icing.
I also liked the comments from GOODTIMES above about pre-throwing taught at TBR. I asked a few weeks back about ideas on keeping warm between innings. The idea of working up a good sweat ahead of time is wonderful when its north of 50 degrees and sunny, but those early overcast days in the 40's seem like they would quickly cool down the arm unless the pitcher takes the necessary steps to keep warm.