Former Pumas prop Guillermo Roan flies the flag for all of the Americas this weekend .
Prop 'll do so from the bench for Zebre when they welcome Edinburgh to Stadio Lanfranchi on Saturday .
Former Pumas prop Guillermo Roan flies the flag for all of the Americas this weekend , and he 'll do so from the bench for Zebre when they welcome Edinburgh to Stadio Lanfranchi on Saturday .