Marquez, nicknamed "Dinamita" (Spanish for dynamite), blew up Pac-Man with just a second left in the sixth round this past weekend, knocking him out and finally adding a decisive result to the two fighters' epic rivalry, which began back in 2004.
Pacquiao still leads the series, 2-1-1, but Marquez has given boxing fans a big reason to go back and judge the previous three fights for themselves.
With Pacquiao reeling and Marquez soaring high, we'll break down the biggest takeaways from Saturday's stunning result.
Marquez is an Elite Counterpuncher
Marquez has been known for his ability to end a fight quickly with his brilliant counterpunching, but it was an absolutely perfect counter strike that earned him his 40th career knockout win on Saturday night. Pacquiao's eagerness to rough up Marquez before the end of the round cost him the fight and provided Marquez with the one opening that he needed to confirm his doubts about the previous three fights.
If boxing fans didn't consider Marquez an elite counterpuncher as well as one of the best pound-for-pound boxers in the world before Saturday's match, they will now.
Counterpunching has long been a strength of Dinamita's, but never before have we seen it on display in such a key moment or in such a huge bout. Pacquiao will regret opening himself up to that shot, but we must credit Marquez for capitalizing.
Pac-Man's Defense Must Improve
Manny Pacquiao looked like an amateur boxer in the moments leading up to Marquez's overhand right, which ultimately floored him and ended the bout. Pacquiao threw a poorly timed punch and opened himself up to a devastating shot.
If Pac-Man doesn't become a more controlled boxer and a better defender, he's only going to go down in flames more and more often.
This tweet from @ThaRightTone sums up Manny's biggest problem:
Defense wins championships ladies and gentlemen even in boxing! Pacquiao has little!— Antonio-Tony-Scron L (@ThaRightTone) December 9, 2012
There's no shame in being knocked out by one of the best to ever put on a pair of boxing gloves in Marquez, but there is plenty of shame in failing to learn from a mistake as prominent as the one that he made on Saturday night.
With only one second remaining in the sixth round, there was only one mistake that could hurt Pacquiao, and he made it.
Money is the Hands-Down Best
If boxing fans take away only one thing from Saturday's fight, it should be the understanding that the undefeated Floyd "Money" Mayweather Jr. is the best pound-for-pound boxer on the planet.
Sure, he has still yet to fight Pacquiao, but after two straight defeats, Pac-Man's legacy has taken a significant blow, and Mayweather is all smiles at 43-0. Until someone beats him, he has to be considered the best.
Once believed to be the only fighter capable of beating Money, Pacquiao has since proven that he has his own issues to take care of inside the ring.
Mayweather hasn't fought since last May, but it doesn't matter. Pacquiao's loss is his gain.
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