Nick Diaz deserves a ton of credit for giving B.J. Penn perhaps the worst beatdown of his career, including the steamrolling that was UFC 94.
After dropping a competitive first round, Diaz broke Penn's spirit in the second round in a way that many analysts didn't think possible, especially not that early in the fight.
Although the third round was more competitive, Diaz walked through Penn's best punches and dished out far worse.
That said, while B.J. Penn is certainly a sterling name on Diaz's resume, he's not exactly the best gauge for the cream of the crop in the welterweight division and most certainly isn't at all the same kind of fighter as Georges St-Pierre.
St-Pierre and, for that matter, the top welterweights in the UFC, represent much different challenges than Penn.
Diaz proved at UFC 137 that he can box with elite strikers in the division and that he can survive on the floor with them as well.
Now that Dana White has announced that Nick Diaz will in fact be facing St-Pierre on Super Bowl weekend, the new questions will revolve around how well Diaz can do against St-Pierre and other similar fighters.
Here are 5 questions still unanswered after UFC 137.