Zapata began his professional boxing career in 1977, beating Victor Lopez[?] by a knockout in the second round. He had 2 wins in '77.
He had a fast ascent to the top: By his fifth bout, on July 1 of 1978, he was meeting former world Flyweight champion Juan Guzman[?] in Panama City, beating Guzman by a decision in ten. His next fight, against Yong-Hwang Kim[?], in South Korea, was his first fight abroad, and he gifted himself with a birthday present by beating Kim by a 10 round decision on August 19 of that year, when he turned 20. Then, he met future world Flyweight champion Alfonso Lopez[?], for the vacant Latin American Jr. Flyweight belt. Zapata suffered his first loss in the fight against Lopez, when he was beaten by a decision in 12.
He started 1979 with a fight against Ramon Perez[?] in Puerto Rico, winning by a knockout in nine. He had three more wins in 1979, including one over the two time world Flyweight champion Freddie Castillo[?], and by the end of that year he was ranked number one in the world among Jr. Flyweight challengers by the WBC.
Zapata went to Japan in March of 1980, and on the 24th day of that month he beat defending world champion Shigeo Nakajima[?] to become world Jr. Flyweight champion. He defended his title against Chi-Bok Kim[?], winning a 15 round unanimous decision in South Korea, agaisnt Hector Rey Melendez[?] in Venezuela, winning also by a 15 round decision, against Nakajima in a Tokyo rematch, winning by knockout in 11, and against Reynaldo Becerra[?] in Venezuela. He closed out 1980 win a 15 round decision win over Becerra.
In 1981, he and future world Flyweight champion Joey Olivo[?] fought what was the only Jr. Flyweight title bout ever broadcasted on American national tv live until Michael Carbajal came along nine years later. Zapata beat Olivo by a knockout in round 13 to retain his belt, and then, he went to San Francisco to retain the crown once again, with a 15 round decision over Rudy Crawford[?]. On August 15, and back home in Panama City, he beat Mexican German Torres[?] by a decision in 15 to retain his belt, and then he faced former world Jr. Flyweight champion Netrnoi Sor Vorasingh[?], retaining the belt by a knockout in 10.
In his next fight, on February 6 of 1982, Zapata lost the world title by knockout in two at the hands of Amado Panterita Ursua[?], but Ursua in turn would lose it to Tadashi Tomori[?]. On July 20, Zapata regained the world title by beating Tomori on a 15 round decision in Japan. Then, he beat future world champion and Zapata-conqueror Jung Koo Chang by a decision in 15 in Chonju[?], and he closed out the year with a rematch against Tomori in Tokyo, knocking Tomori out in eight rounds.
On March 26 of 1983, Zapata and Chang met again in South Korea, and this time, Chang became world champion by knocking Zapata out in the third round. Then, on November 10 at Las Vegas, on the Marvin Hagler-Roberto Duran undercard, Zapata was beaten by a knockout in 10 by Harold Petty[?].
His career seemingly over, he quickly recovered from those back to back losses and began winning again, but this time as a Flyweight. By the end of 1984, he was ranked number one by the WBA among Flyweights, and on December 8 of that year, he challenged world Flyweight champion Santos Laciar of Argentina at Buenos Aires' legendary Luna Park[?]. Zapata lost a 15 round decision that night, but in 1986, after Laciar had vacated the crown, the WBA gave him a second chance, and he beat Alonzo Gonzalez[?] to win the WBA world Flyweight championship. He then beat Javier Lucas[?] to retain the belt. He retained the title also against Shuichi Hozumi[?], Dodie Penalosa[?], Alberto Castro[?] and Claudemir Calvalho[?], all by decision, before losing it to Fidel Bassa[?] of Colombia, also by a decision.
In 1993, he tried to become a world champion once again, but was knocked out in the first round by the WBC world Jr. Bantamweight champion Sunkil Moon[?]. A win against Moon would have made Zapata a member of the exclusive group of world boxing champions in three different weight categories or more.
It can also be added that Zapata's first pair of boxing gloves, when he was 12, came as a present from Duran himself.
Panamanian newspaper El Panama America[?] declared recently on one of their editorials that Zapata, according to their opinion, should be inducted to the International Boxing Hall Of Fame soon.
Zapata had a record of 43 wins and 10 losses, with 1 draw, and 15 wins by knockout.
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