A reported injury to Bobby Green has caused quite a shakeup on this Saturday's UFC 172 fight card.



A lightweight fight between Vagner Rocha and Joe Ellenberger is "in the works", according to MMA Fighting's Ariel Helwani.



Ellenberger's original opponent for UFC 172, Yancy Medeiros, is now fighting Jim Miller on the main card to replace Green, according to sources. Various reports have Medeiros vs. Miller as a done deal.



Rocha is making his UFC return since he was knocked out by Jonathan Brookins at UFC on FUEL TV on Feb. 15, 2012. He has won four straight fights.



Ellenberger, the twin brother of Jake, is making his UFC debut.

Jon Jones will defend his UFC light heavyweight title once again when he faces Glover Teixeira in the main event.