Peralta won his first five fights by knockout, then went the ten round distance for the first time on September 6 of that same year, against
Montevideo, Uruguay. His first fight abroad had already been held, when he beat Marcelo Farias
by a second-round knockout 35 days before, also at Montevideo.
On October 22, he and Manzur had a rematch, with the two boxers drawing (tying) after ten more rounds.
On March 31, 1959, Peralta suffered his first loss as a professional, a ten-round decision defeat to then reigning South American light heavyweight champion Luis Ignacio in São Paulo, Brazil in a non-title bout. Peralta had one loss and two draws in his next three fights, but then he returned to winning, when he avenged his defeat against Ignacio by knocking him out in three rounds, August 23 in Brazil.
After winning his next five fights, including four in
Lima, Peru
.
Peralta then won twelve and drew one of his next thirteen bouts. Among those were a ten-round decision in a rubber match with Manzur, and a four-round
for the Argentine Heavyweight title. He won the national belt by outpointing Giorgetti over twelve rounds, and then won fifteen more bouts in a row, for a total of 24 victories and one draw in twenty-five bouts.
Beats Pastrano
The biggest win of his career came during that streak, when he outpointed world light heavyweight champion
Miami, Florida
on September 20, 1963 in a non-title bout. His first fight with Pastrano marked Peralta's United States debut as a professional boxer.
Pastrano – light heavyweight title
Peralta's next fight, on November 15 of that year, was also his first bout at New York's
magazines; while the general consensus is that Pastrano was actually winning the fight when it was stopped, Ring En Español
actually claimed twenty years later that Peralta was hitting Pastrano and had him against the ropes when the referee intervened and raised Pastrano's arm as the fight's winner. The truth is a cut opened in the second Thornton fight re-opened during Peralta's challenge of Pastrano and the bout was, to some hastily, to others justifiably, halted.
Bonavena takes Argentine title
Peralta went on to win nine of his next ten fights, including a rematch victory over Mauro Mina, outpointed in ten rounds at Buenos Aires on September 19 of '64, before defending his Argentine Heavyweight title for the first time, and losing it, to Oscar Bonavena by a twelve-round decision on September 4, 1965 in Buenos Aires. They'd rematch four years later.
Peralta then went undefeated over his next 32 bouts, building a record of twenty nine wins and three draws, with seventeen knockouts over that span. Among the highlights of those thirty two bouts were three ninth round disqualifications in a row (over Ron Marsh on March 11, 1968, and two over Felipe Pablo Marich, on April 5 and April 20 of that same year), a ten-round decision over Ramón Rocha on August 23, and a draw in a non-title rematch with Bonavena, held on August 8, 1969.
Foreman
After the Bonavena rematch, he would face George Foreman, in a fight that was nationally televised in the United States, on February 16, 1970, once again at the Madison Square Garden. His now fighting weight being around
200 lbs, Peralta had left the light-heavyweight scene way back.[1]
Foreman was the rising ex-Olympic star and Peralta then ranked 9th world contender was predicted to be George's biggest test to date. Foreman held an aura as an awesome knockout artist but Peralta doggedly went ten full rounds with the future two time world Heavyweight champion. He lost a unanimous decision to Foreman. But Peralta won the crowds admiration for a gutsy good performance. He used his boxing skill and mobility to show Foreman was open to fast well placed counters and tended to somewhat unravel in the later part of matches. It's thought Ali studied this among other Foreman matches in his preparation the legendary 'Rumble in the Jungle' victory.
Peralta's next bout came when he beat future world Light Heavyweight title challenger Piero del Papa, by a fifth-round knockout on June 6 at Montevideo.
His next bout marked his European debut, when he defeated
Barcelona, Spain
. Peralta had three consecutive bouts in Spain, winning each of by knockout.
Foreman rematch
After two more wins, he faced Foreman again, at Oakland, California, this time with the NABF's vacant regional Heavyweight title on the line. Once again, Peralta fought ten rounds with Foreman, but he was knocked out in the tenth, on May 10, 1971. His two Foreman matches are fine achievements.
Peralta then moved to Spain for a one year. With the exception of a victory over
Jose Urtain on October 8, a win over Leroy Caldwell by a fourth-round knockout on February 2, 1972, and a ten-round decision loss to Bob Foster world Light Heavyweight title challenger Ray Anderson
on June 9 of that same year.
Ron Lyle twice
After the loss to Anderson, Peralta would move again, this time to Germany, and he won his next six bouts by knockout. A loss to top world title contender
Denver, Colorado
. Peralta lost to Lyle by a ten-round decision.
Peralta won his next two bouts by knockout in Germany, and then in a rematch held Lyle to a ten-round draw in Frankfurt, Germany. Peralta aged 38 years retired for good after the match.
Gregorio Peralta had an admirable record. It contained 98 wins, 9 defeats and 9 draws as a professional boxer, with 60 knockout wins, which places him in the exclusive group of boxers that won fifty or more fights by knockout during their career.
He led a quiet life after retiring, dying on October 3, 2001.