Osvaldo "Ossie" Ocasio (born August 12, 1955) is a Puerto Rican former boxer who held the World Cruiserweight Championship from 1982 to 1984. He was also a Top Contender and Heavyweight Challenger in 1979. He scored notable wins against Former Cruiserweight Champion Dwight Muhammad Qawi as well as beating Top Heavyweight Contender Jimmy Young and Heavyweight Contender Pierre Coetzer , as well as drawing with Future Heavyweight Champion Michael Dokes. Nicknamed "Jaws", his peculiar nickname was the result of him accidentally biting another boxer during a sparring session.

Ocasio campaigned in the heavyweight division, turning pro in 1976 and putting together 10 wins before signing with Don King and making a name for himself outpointing King fighter Kevin Isaac.

In 1978 on the undercard of the Larry Holmes/Ken Norton title fight Ocasio scored a major upset when he outpointed the highly regarded Jimmy Young, who'd outpointed George Foreman only a while back. In a rematch, Ocasio underlined his superiority by again outpointing a this time in-shape Young, in Puerto Rico. It was Ocasio's career high in the Heavyweight division.

This earned him his only world heavyweight title shot, against Larry Holmes in 1979. Attempting to become the first Hispanic to win the world Heavyweight championship, Ocasio was badly outclassed and was knock out in the seventh round.^[2][3]

In 1980 he fought red hot undefeated prospect Michael Dokes and was unlucky to only get a draw. However a rematch saw Ocasio surprisingly knocked out in 1 round. The following year he travelled to the UK and made little effort against local prospect John L. Gardner, before collapsing without getting hit in the 6th round.

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He later went down in weight, to fight in the then newly created division of the Cruiserweights. In 1982 he was matched with Robbie Williams in South Africa for the vacant WBA title. Ocasio became a world champion by beating Williams by a 15-round split decision. He shared honors as world champion of that division with countryman Carlos De León, the WBC world champion.

Ocasio made three successful defenses, winning 15-round decisions over Young Joe Louis and Randy Stephens, appearing on Jet Magazine the week before the Stephens bout,^[4] and knocking out John Odhiambo in the 15th round in Guaynabo, Puerto Rico. After the bout Ocasio turned down a fight with Great Britain fighter David Pearce, after Morgans Palle had provided contracts to make the fight in the USA, due to the BBBoC not sanctioning the cruiserweight division in the UK. Ossie eventually decided to return to South Africa, where he lost his title to Piet Crous by a 15-round decision. One month before losing the title, his brother had been murdered.

Ocasio, during his championship run, was able to buy a house in Trujillo Alto, where he maintained a large farm. He also participated in a Puerto Rican movie, playing a slave in the production.

In 1986, he made a comeback, winning two fights including a 10-round decision over former world champion Dwight Muhammad Qawi in Atlantic City. Most fans had Qawi winning all 10 rounds, and this is considered one of the worst decisions in boxing history. He attempted to regain his world championship against Evander Holyfield in Marseille, France, but lost by a knockout in 11 rounds.

He returned to the heavyweight division in 1988, defeating Pierre Coetzer in South Africa, but losing the decision in a rematch. After this fight he was relegated to trialhorse status.

In 1989 he made Ray Mercer look bad, losing an 8-round decision. In 1990 he dropped decisions to Tyrell Biggs and Bruce Seldon, then travelled to the UK for two fights losing and being the first opponent to take Lennox Lewis to the distance and scoring an upset when stopping Jess Harding in 8 rounds. Ocasio then travelled to Australia, where he was outpointed by the erratic Mike Hunter.^[5]

One last comeback in 1992 resulted in a dreary points loss to ex-contender Carl Williams, but it was hard hitting Hispanic prospect Alex Garcia who convinced the usually durable Ocasio to retire- he decked Ocasio several times before knocking him out in the 8th.

He retired from boxing with a record of 23 wins, 13 losses and 1 draw, with 12 knockout wins. He currently resides in Orlando, Florida.

• List of cruiserweight boxing champions
• List of Puerto Rican boxing world champions