The UFC 137 Main Event saw Nick Diaz's return to the UFC against one of the greatest mixed martial artists of all time in BJ Penn.
BJ looked good in the first round, landing several punches on the physically bigger Diaz, but as we have seen several times, lately, BJ seemed to fatigue early.
Diaz came out in the second round in dominating fashion, pulverizing the former UFC Welterweight and UFC Lightweight Champion.
The third round saw much of the same as Diaz used his superior conditioning to pressure the exhausted BJ Penn to take home the victory.
Perhaps more importantly, BJ stated after the fight that it might be the last time we see him in the octagon. When asked by Joe Rogan if he was announcing his retirement after the loss, BJ responded saying "I have one daughter, another one on the way. I don't want to go home looking like this. I'm done."
Whether we see "The Prodigy" in the octagon again or not; he will without a doubt be remembered as a UFC Legend.