I wonder if Garcia is happy Greer is staying, after all he was one of Poyet's signings and his captain. It would have made sense to me for Greer to move on and Garcia appoint his own man. There is way, way too much stacked against Garcia atm, would have made sense to cut a few of the Poyet signings adrift.
Only if those players take against Garcia - we have NO evidence whatsoever of that.