There's no doubt that Team USA will miss the services of rugged Tampa Bay Lightning forward Ryan Callahan, who will sit out September's World Cup of Hockey after undergoing surgery to repair a labral tear in his right hip.
Callahan is a two-time U.S. Olympian who epitomizes the kind of hard-nosed, glue guy the U.S. selection committee was looking for when it assembled the 23-man roster that will try to wrest international hockey dominance away from Canada and outlast the six other teams taking part in the tournament.
But the immediate question is: Who will take his place on the roster?