I love, just love, how you inject an opinion into the data on the one guy that isn't performing well by the metric you are listing but not the other four. It is such a you move.
Cobb 4.76 FIP
Wojo 5.11 FIP
Eshelman 5.72 FIP
Milone does have a very nice 2.52 FIP
It is of my view that going forward they are more likely to preform at the level of their FIP than their current ERA.