Readers may watch the weigh-in live via video stream below.
Headlining UFC 155 is the heavyweight title fight between UFC champion Junior Dos Santos (15-1 MMA, 9-0 UFC) and former champ and top contender Cain Velasquez (10-1 MMA, 8-1 UFC).
The card will showcase a co-main event bout between lightweights Joe Lauzon (22-7 MMA, 9-4 UFC) and Jim Miller (21-4 MMA, 10-3 UFC).
On the main card undercard will also be following Middleweight bouts:
- Tim Boetsch (16-4 MMA, 7-3 UFC) vs. Constantinos Philippou (11-2 MMA, 4-1 UFC)
- Alan Belcher (18-6 MMA, 9-4 UFC) vs. Yushin Okami (27-7 MMA, 11-4 UFC) and
- Chris Leben (22-8 MMA, 12-7 UFC) vs. Karlos Vemola (9-3 MMA, 2-3 UFC).
Dos Santos vs Velasquez I - Weigh-In (2011)
Last year, a crowd of nearly 2,000 witnessed the Dos Santos vs Velasquez I weigh in Santa Monica, CA.
A large roar erupted when then UFC Heavyweight Champion Cain Velasquez stepped on the scale. Back then, those in attendance were decisively pro-Valasquez as the few cheers for dos Santos were drowned out by the boos.
Who will own the weigh in crowd tonight in Las Vegas?
Dos Santos vs Velasquez I marked Velasquez's first defense of the title and his first bout in quite awhile, nearly 13 months to be exact. Cain lifted the UFC Heavyweight Title from Brock Lesnar in October 2010 but suffered a partially torn rotator cuff whiched forced him to take a hiatus.
Junior Dos Santos
Credit:Gleidson Venga, Sherdog
"They were really going crazy for him in Anaheim last year," Dos Santos told USA TODAY early last year soon after Dos Santos vs Velasquez I was announced. "But in a fight, my focus is my opponent. ... It really doesn't matter what the crowd is doing because at that moment in time, I'm not paying attention to them."
Last year against Junior dos Santos, Cain Velasquez tipped the scale at his highest weight ever for a UFC bout - 249 lbs. The then UFC heavyweight champion weighed had 235.5 pounds for his first UFC fight in April 2008 and 244 lbs against Lesnar.
Dos Santos, who usually weights between 234 and 240 lbs, weighed 239 lbs.
How much will they weigh tonight?
In Dos Santos vs Velasquez I last year, Velasquez suffered his first loss via KO (punches) at 64 seconds of the first round. It was later revealed Dos Santos was carrying a minor knee injury, and took an injection of cortisone into the knee before the fight, followed by information revealing that Velasquez had re-injured his rotator cuff approximately a week before the fight. However, Junior dos Santos had fought injured as well as it was revealed after the fight, he had a torn meniscus in his knee and would undergo knee surgery following the fight.
Most Recent Weights
On May 26 at UFC 146, Junior Dos Santos tipped the scales at 239 lbs while his rival, Cain Velasquez, chimed in at 240 lbs - 9 lbs lighter than he was for the first Dos Santos vs Velasquez weigh in.
Dos Santos defeated Frank Mir via TKO in Round 2 while Velasquez punished Antonio Silva, winning a first round TKO.
Credit for Main Pic: Credit: Dave Mandel, Sherdog
Dos Santos vs Velasquez 2 Weigh in Results and Live Stream
Junior dos Santos (239) vs. Cain Velasquez (240)
Jim Miller (156) vs. Joe Lauzon (156)
Tim Boetsch (186) vs. Costa Philippou (186)
Yushin Okami (184) vs. Alan Belcher (186)
Chris Leben (185) vs. Derek Brunson (185)
Brad Pickett (136) vs. Eddie Wineland (135)
Erik Perez (136) vs. Byron Bloodworth (136)
Melvin Guillard (155) vs. Jamie Varner (155)
Michael Johnson (154) vs. Myles Jury (155)
Phil DeFries (245) vs. Todd Duffee (249)
Leonard Garcia (146) vs. Max Holloway (145)
Chris Cariaso (125) vs. John Moraga (126)