Weights are in from Cancun, Mexico. All heavyweights weighed in on Thursday, with the rest of the card weighing in today. All fighters made weight, except one - Jose Luis Castillo, who missed his 30-day and 7-day weigh-in checkpoints before weighing in 4 1/2 lb over the junior welterweight limit. His fight with undefeated Tim Bradley has been cancelled as a result, with Bradley now elevated to WBC 140 lb. mandatory challenger by default.

All of the action kicks off Saturday evening at La Plaza de Toros in Cancun, Mexico. The co-feature (Juan Diaz-Nate Campbell) and main event (Oleg Maskaev-Samuel Peter) will air live on HBO (Saturday, 9:30PM ET).

Full weights as listed below:

DON KING PROUDCTIONS IN ASSOCIATION WITH DUVA BOXING & PEPE GOMEZ PROMITIONS PRESENTS:

Saturday, MARCH 8, 2008, LA PLAZA DE TOROS, CANCUN, MEXICO

MAIN EVENT, 12 ROUNDS, WBC HEAVYWEIGHT CHAMPIONSHIP

OLEG MASKAEV (34-5, 26 KO) 243 lb.

SAMUEL PETER (29-1, 22 KO) 250 ¾ lb.

CO-FEATURE, 12 ROUNDS, IBF LIGHTWEIGHT CHAMPIONSHIP

JUAN DIAZ (33-0, 17 KO) 134 lb.

NATE CAMPBELL 31-5-1 (25 KO) 134 ½ lb.

12 ROUNDS, WBC HEAVYWEIGHT QUALIFICATION

JOHN RUIZ (42-7-1, 29 KO) 233 lb.    

JAMEEL McCLINE (39-8-3, 23 KO) 268 lb.

10 ROUNDS,SUPER FEATHERWEIGHT

RAY BELTRAN  (21-3, 13KO) 130 lb.

MOISES PEREZ (6-4, 5 KO) 130 lb.

12 ROUNDS, LIGHT FLYWEIGHT

GILBERTO KEB BAAS (28-16-2, 16 KO) 108 lb.

ADRIAN HERNANDEZ (12-0, 10 KO) 108 lb.

8 ROUNDS, FEATHERWEIGHT

GUTY ESPADAS JR. (41-7, 26 KO) 125 ¾ lb.

LEONILO MIRANDA (27-0, 26 KO) 126 lb.

8 ROUNDS, HEAVYWEIGHT

DAVID RODRIGUEZ (27-0, 25 KO) 249 lb.

JOSH GUTCHER (18-8, 13 KO) 244 lb.

6 ROUNDS, SUPER LIGHTWEIGHT

ANTONIO FITCH (9-1, 9 KO) 140 ½ lb.

MANUEL “La Mamba” GARCIA (6-1-1, 2 KO) 140 lb.

6 ROUNDS, BANTAMWEIGHT

SALVADOR SANCHEZ (9-3-2, 4 KOs) 118 lb.    

ALEJANDRO  ROMERO (6-4-1) 118 lb.

(ALL BOUTS SUBJECT TO CHANGE)