MIKE Tyson was impassive and silent yesterday as he weighed in for his first fight in more than four years, and his first fight since serving a three-year prison sentence for rape. Tyson weighed 220 pounds for the scheduled 10-round bout against Peter McNeeley - his heaviest fighting weight since he lost the undisputed world heavyweight title to James 'Buster' Douglas in Tokyo in 1990. Tyson weighed 220.5 pounds for that bout. He weighed 221 pounds in 1986 when he beat Trevor Berbick for the World Boxing Council title to become the youngest world heavyweight champion in history. He was also 221 when he beat Tony Tucker to unify the title on August 1, 1987. Despite the heavier weight, Tyson looked lean. His strength and conditioning coach, Carlos Blackwell, said the 29-year-old fighter's heavier weight was due to increased muscle mass and a lower body fat percentage. Blackwell has been working with Tyson since May, and has the fighter on a nutritional programme designed to eventually lower his body fat to about seven per cent. McNeeley, the 26-year-old from a Boston suburb who did not start fighting professionally until August, 1991, weighed in at 224 pounds. McNeeley flexed his biceps and roared for the crowd of a couple of thousand at the MGM Grand Garden Arena in Las Vegas, where the fight is scheduled for tomorrow morning (9 am Hong Kong time). The weigh-in was open to the public at no charge, and drew a crowd of nearly 3,000 fight fans and curious onlookers from the adjoining casino. Tyson drew the cheers, but did not speak. He left the stage quickly after an ESPN sports television announcer told the live television audience he would answer some brief questions. Tyson has been kept virtually in seclusion, except for brief forays under very controlled conditions, to try to sell the pay-per-view cable television fight. It is being broadcast by Showtime Event Television for as much as US$49.95 if ordered in advance and more if ordered the day of the fight. In a brief and mandatory news conference earlier this week, Tyson said: 'I'm gonna knock Peter McNeeley out. You come and watch. I'm sure you'll find it very stimulating . . . I'm here to win, man.' The former champion is slated to make US$25 million for his first fight since June 28, 1991, when he outpointed Donovan 'Razor' Ruddock. McNeeley, an overwhelming underdog, is to make US$700,000 according to the contract filed with Nevada boxing officials. Tyson's return is so anticipated that for the first time in the memory of many ringsiders, a world heavyweight championship fight is taking second billing to a non-title fight. Also on the Tyson-McNeeley card is World Boxing Association (WBA) champion Bruce Seldon (32-3) defending his title against Blackfoot Native American Joe Hipp (30-3). The Vegas card also includes World Boxing Champion (WBC) middleweight champion Julian Jackson putting his crown on the line against Quincy Taylor and the WBC lightweight champion Miguel Angel Gonzalez of Mexico against Lamar Murphy. Seldon won the vacant WBA title by stopping Tony Tucker in the seventh round last April. For many boxing observers, Seldon, and WBC champion Oliver McCall are seen as baby-sitting the titles until Tyson is ready to fight for them.