Seconds after the fight, Sonnen dedicated his win over Rua to his grandmother, before launching into a pro wrestling-style rant.
Part of the post-fight rant included an epic callout of his longtime rival, Wanderlei Silva.
"Right here on the UFC's new home, FOX Sports 1, Wanderlei Silva, 6 feet tall and 205 pounds," Sonnen said in his post-fight interview with UFC color commentator Joe Rogan. "Boy, until I met you, I didn't know they could stack crap that high."
Silva would be more than happy to take on the challenge.
"When I fight with him, it's going to be a great fight, it's going to be a good match," Silva said. "But when I fight with him, he's going to know what's going to happen. I'm not going to just fight. I'm going to hurt him."
Sonnen officially defeated Rua at the 4:47 mark of the opening frame, as he sunk in a guillotine choke that sent the Brazilian legend to an early shower.
With the victory, Sonnen (28-13-1 MMA, 7-6 UFC) took home his first victory in over a year, while Rua has now dropped two in a row inside the world famous Octagon.
In other action on the main card of UFC Fight Night 26, Travis Browne stopped Alistair Overeem with a ridiculous front kick to the face at the 4:08 mark of the opening stanza, and Matt Brown needed just 29 seconds to finish off Mike Pyle.
Here's a look at the full UFC Fight Night 26 results:
- Chael Sonnen def. Mauricio "Shogun" Rua via submission (guillotine choke) — Round 1, 4:47
- Travis Browne def. Alistair Overeem via KO (head kick, punches) — Round 1, 4:08
- Urijah Faber def. Yuri Alcantara via unanimous decision (30-26, 30-26, 30-27)
- Matt Brown def. Mike Pyle via KO (punches) — Round 1, 0:29
- John Howard def. Uriah Hall via split decision (30-27, 28-29, 29-28)
- Michael Johnson def. Joe Lauzon via unanimous decision (30-27, 30-27, 30-25)
- Michael McDonald def. Brad Pickett via submission (triangle choke) — Round 2, 3:43
- Conor McGregor def. Max Holloway via unanimous decision (30-27, 30-27, 30-26)
- Steven Siler def. Mike Brown via KO (punches) — Round 1, 0:50
- Diego Brandao def. Daniel Pineda via unanimous decision (29-28, 29-28, 29-28)
- Manny Gamburyan def. Cole Miller via unanimous decision (30-27, 29-28, 29-28)
- Ovince St. Preux def. Cody Donovan via KO (punches) — Round 1, 2:07
- James Vick def. Ramsey Nijem via submission (guillotine choke) — Round 1, 0:58