The friend said someone who would be closer "in a couple of days."
Doesn't sound like Lyon, who's at least a couple weeks away — and may work in setup for a spell upon his return.
He may well be thinking of Rodney, though he's only a temporary plug-in while Farnsworth sits his suspension.
As phunkadelic said, it could be any of 20 guys; still, I'm betting Guardado, Wagner and even Mesa stay put. The best odds are probably on Baez moving and Borowski stepping in ... though Joe could always melt down and give way to Orvella.