Diaz missed the lightweight limit at 155 pounds and then cut to within one-quarter pound of the allowable 156-pound limit.
Listen here for Kevin Iole's breakdown of the Diaz situation (0:35 mark).
Instead of taking 20 percent of Diaz's purse, as is normally mandated by state commissions, Cerrone agreed to re-work the contract. He also said Diaz didn't have to cut anymore weight.
That's when Cerrone's camp told its fighter to pipe down and asked Diaz to go lose the weight. Diaz did so without any resistance and the most heated fight at UFC 141 is a go.
Many people were in attendance to see massive heavyweights Brock Lesnar and Alistair Overeem weigh in. Overeem came in at a career-high 263 pounds. Lesnar, who lost a significant amount of weight during his bouts with diverticulitis, came in at 266. The big man is back.
There were some prefight rumors that the UFC wouldn't have Cerrone and Diaz square off today.
Yesterday's staredown at the final press conference resulted in a near brawl when Diaz flipped Cerrone's cowboy hat from his head. The staredown happened today, but it was brief and UFC president Dana White was between the fighters, who were at a distance.
UFC 141 weigh-in (Courtesy MMAjunkie):
MAIN CARD (Pay-per-view)
Brock Lesnar (266) vs. Alistair Overeem (263)
Donald Cerrone (156) vs. Nate Diaz (156)
Jon Fitch (171) vs. Johny Hendricks (170)
Alexander Gustafsson (203) vs. Vladimir Matyushenko (205)
Jim Hettes (145) vs. Nam Phan (146)
PRELIMINARY CARD (Spike TV)
Junior Assuncao (145) vs. Ross Pearson (145)
Danny Castillo (156) vs. Anthony Njokuani (154)
PRELIMINARY CARD (Facebook)
Dong Hyun Kim (171) vs. Sean Pierson (171)
Efrain Escudero (155) vs. Jacob Volkmann (155)
Luis Ramos (171) vs. Matt Riddle (170)
Manny Gamburyan (146) vs. Diego Nunes (145)