Silva was getting dominated in Round 1, as Sonnen connected with a great takedown, a testament to his wrestling.
Sonnen administered the ground-and-pound and although the referee was calling for work, Sonnen worked the whole time, getting himself into half guard and then mounting the champion with a minute to go.
It was a completely different Silva in Round 2, as he displayed excellent takedown defense and when Sonnen realized he was in a striking war, Silva started his trademark head movement.
Sonnen made a huge error, attempting the spinning back fist and Silva capitalized, finishing the trash-talking Oregon native with a knee to the sternum and a flurry of punches.
There have been some great comeback performances in the UFC.
Whether it was that shocking late-round KO or that arm lock that was waiting to be applied, some of the performances listed truly showed the heart of MMA, one that doesn't stop.
The six greatest UFC comebacks!
It's the measuring stick to what we were expecting to see for their rematch. Silva and Sonnen went to war in August 2010 and for all the trash-talk that Sonnen threw the way of the Brazilian, Silva didn't utter a peep entering the fight.
After the first four rounds, Sonnen was up on every judge's scorecard and was five minutes away from winning the fight. Sonnen was taking down Silva with relative ease for that first 20 minutes, but as we all know, a triangle choke got in the way of Sonnen's championship aspirations.
Some say it was a fluke, but it showed that as long as there's time on the clock, you still have a chance to win.
Brock Lesnar came under fire in this bout due to the long layoff with his first case of diverticulitis. The relative newbie UFC heavyweight champion hasn't fought since his win over Frank Mir at UFC 100 and Carwin was also coming off a win over Mir to claim the interim title while Lesnar was sick.
Anyway, at UFC 116, Carwin proved to be a huge test for Lesnar's chin, as well as his ground game. Carwin out worked the NCAA Division I national champion and was in position to win the fight in the first round on a number of occasions.
In Round 2, Lesnar woke up and came back at Carwin. Lesnar finally secured a much-needed takedown, and with his wrestling background on his side, he got an arm triangle and Carwin was forced to tap.
That was Lesnar's last MMA win.
While then-UFC heavyweight champion Randy Couture was in a contract dispute, the former champion Tim Sylvia and former PRIDE champion Antonio Rodrigo Nogueira went to war for the interim belt.
It was all Sylvia in the first five minutes, as the nearly 7' giant dropped Big Nog and kept him at bay.
It was more of the same in the second round, as the bloody Brazilian fought hard to come back, but was still getting nowhere.
It seems we're always talking about the best comebacks in MMA history when we talk about Nogueira—he's almost synonymous with it, winning fights out of nowhere.
This fight was the key point to that claim.
Nogueira got his jiu-jitsu in gear in the third round and after great technique to keep the giant from continuing his beating, Minotauro sunk in the guillotine and forced the Maine-iac to submit.
Nog got his first taste of UFC gold on that night after a stunning come-from-behind win.
In their first encounter, Matt Hughes defeated Frank Trigg by rear-naked choke.
In the lead-up to this fight, Hughes stated he didn't want to finish the fight by submission.
That was the least of his worries in the first round, as Trigg caught the champion with an illegal blow to the groin and continued to fight when the referee didn't step in.
Trigg had Hughes on the ropes for a couple minutes on the ground, got mount and then his back in a possible rear-naked choke opportunity of his own.
Hughes escaped the submission attempt and in amazing fashion, driving Trigg down with a devastating body slam across the Octagon. Hughes went on to out work Trigg on the mat, and while he didn't want to do it that way, he got another rear-naked choke and forced Trigg to tap, successfully defending his UFC welterweight title.
When discussing this fight (as seen in the video), Joe Rogan said, "If you saw it in a movie, you would say 'This is bulls***, that never happens.'"
The comeback wasn't over a huge span of time, although Pete Sell did get a good deal of offense in the fight thus far.
What capped it all off was a huge body shot that sent Scott Smith reeling and writhing in pain. As Sell went in for the finish, it was he who would smell the hand of defeat when Sell was surprised by right hand from Smith.
Both men remained on the ground, nursing their injuries. An absolute violent finish in this one.
Some of you will probably be put off by the fact that I put this fight at No. 1, but the fact is, it really was.
The reason why this got the top spot is because Silva had to prove himself to be the champion in this fight, and after Round 1, as mentioned before, got taken down early and couldn't fend off a barrage of fists by the challenger.
So, technically, Sonnen has won five rounds against Silva all time. You score that at home and you see that Silva is on the ropes, still devastated and nervous from how the first fight went and the trash-talk didn't really help matters. If anything, an enraged Silva had to take a round to cool off and focus.
When Round 2 came, he was the pound-for-pound best fighter in the world.
What do you think?