As I speculated in an earlier post regarding bringing up Lalos, I wouldn't be surprised if Foskey is inactive on Monday now that the Saints have brought up Philips. Same thinking, different practice squad elevation.
I still think they'd like to give the 2nd rounder some rotational work in games, but I can see them going with Phillips over Foskey more than I could see them going w/ Lalos b/c Phillips has a lot more NFL experience.