It was not the most exciting fight in the world, but St-Pierre was able to use his wrestling to dominate Diaz.
Although it was an easy fight to call and we know who St-Pierre should fight next, Diaz's MMA future is uncertain.
While we don't know if this really is the last we will see of him, here is what we learned from the fight.
What we'll remember about this fight
This was a typical St-Pierre fight. Score a takedown, use some ground-and-pound, be better rolling on the ground, use a few superman punches or jabs and repeat. Diaz was suppose to outbox St-Pierre, but that was not the case. This could go down as Diaz's last fight and without a doubt one of his worst.
What we learned about Diaz
We already knew Diaz liked to talk trash. But he also proved to be a pretty dirty fighter. Whether he was trying to get in the head of St-Pierre or he really wanted to land cheap shots at the end of the first three rounds, attempting to go for St-Pierre well after the horn buzzed was uncalled for.
What we learned about St-Pierre
We really did not learn anything new about St-Pierre. Saturday night's performance was a carbon copy of what we have seen before. Many may not like it, but St-Pierre's wrestling is what makes him a great champion. One thing he did show was great jiu-jitsu, as he rolled very well with Diaz.
St-Pierre may not be the pound-for-pound best fighter in the world, but he may be the all-around best when it comes to attributes. He is a great wrestler, strategist, striker and Brazilian jiu-jitsu artist; he just needs to finish a fight to prove it to the rest of the world.
What's next for Diaz
Saturday night Diaz claimed this could be the last fight of his MMA career. If that truly is the case, he has had quite the memorable career. While most of it has been filled with controversy, Diaz is a proven champion and one of the most entertaining fighters MMA has ever seen. If he is riding into the sunset, hopefully he has enough money to keep himself stable in retirement.
What's next for St-Pierre
Although Diaz's future is not set in stone, St-Pierre's is. St-Pierre should face Johny Hendricks next. Hendricks perhaps should have been the man to face St-Pierre Saturday night, but Diaz talked his way into the fight after being gone for a year. Despite this, though, good things come to those who wait, and Hendricks could be the one fighter to stop St-Pierre's reign as champion.