The fight took place on December 7, 1970, Bonavena was a strong but awkward fighter with little skill for the defense but assimilated punishment by Ali and it was not until the 15th round that he fell three times and lost the fight by technical knockout.

His record was not so bad taking into account that he was active during the Frazier, Ali, Foreman age.

58 Won (44 Knockouts), 9 Defeats, 1 Draw

Oscar, started as a boxer at Club Atlético Huracán, and in 1959 he was an amateur champion. He began his professional career in the United States, the mecca of this sport, where he returned frequently. He defeated Canadian champion George Chuvalo, fought twice with striker Joe Frazier - in the first one he knocked him down twice, in the second he contested the World Boxing Association heavyweight crown in December 1968 - and the 7 Of December of 1970 faced the mythical Muhammad Ali in the imposing Madison Square Garden. His boxing record was 58 fights won, 9 losses and 1 draw.

In February of 1976, Bonavena realized what would be its last combat, against Billy Joiner. On May 22 of that year, Oscar had a legal restriction not to approach the Mustang Ranch brothel, due to the constant fights that he did, but he did not want to comply with this order and went to the building with intentions to enter, apparently he tried to attack the guard and he shoot and kill him in self-defense. Bonavena was only 33 years old

More Info: es.wikipedia.org