Well this is good:
"Q: In light of recent events regarding coaching/personnel staff, is there any form of compensation due to the Patriots for losing Josh McDaniels, Scott Pioli (which is now looking likely) and potentially Dom Capers?
Dave, Mexico City
A: Dave, there is no compensation to the Patriots in the case of McDaniels, as he received a promotion. As I understand it, the same would be true for Pioli, who would have final-say authority over football decisions. Capers is not a compensation type situation either."
We wouldn't have to pay anything other than his contract!
http://www.boston.com/sports/footbal..._13_09/?page=5