On September 21, 1983, the 24-year-old WBC cruiserweight world champion, Carlos De León (35-3, 24 KOs), faced Yaqui Lopez, in a title defense fight.
León came in to the fight on a 3-fight win streak with a 63% KO rate, and was fighting after a gap of 2 months and 4 days.
Carlos De León stopped Yaqui Lopez via TKO in the 4th round of the 12-round world-title fight, and successfully defended his WBC cruiserweight title. León improves his record to 36-3 (25 KOs)
On August 1, 1987, the 28-year-old WBC cruiserweight world champion, Carlos De León (42-4, 28 KOs), faced Larry Phelps, in a title defense fight.
León came in to the fight on a 3-fight win streak with a 60% KO rate, and was fighting after a gap of 5 months and 11 days.
Carlos De León made quick work of Larry Phelps, stopping the challenger via KO in the 1st. León improves his record to 43-4 (29 KOs)
On February 24, 1982, Carlos De León and Marvin Camel met again in a rematch.
León came in to the fight on a 16-fight win streak with a 66% KO rate, and was fighting after a gap of 2 months and 12 days. Camel was on a 4-fight win streak with a 40% KO rate, and fighting after a layoff of 4 months and 22 days.
In the rematch, Carlos De León stopped Marvin Camel via TKO in the 8th round of the 15-round world-title fight, and successfully defended his WBC cruiserweight title. León improves his record to 32-2 (23 KOs), while Camel adds a loss to his record at 40-4-2.
On February 21, 1987, the 27-year-old WBC and The Ring cruiserweight world champion, Carlos De León (41-4, 27 KOs), faced Angelo Rottoli, in a title defense fight.
León came in to the fight on a 2-fight win streak with a 60% KO rate, and was fighting after a gap of 6 months and 11 days.
Carlos De León stopped Angelo Rottoli via TKO in the 5th round of the 12-round world-title fight, and successfully defended his WBC and The Ring cruiserweight titles. León improves his record to 42-4 (28 KOs)
On May 17, 1989, 30-year-old Carlos De León (44-5, 29 KOs) and Sammy Reeson fought for the vacant WBC cruiserweight title.
León came in to the fight on a 1-fight losing streak with a 59% KO rate, and was fighting after a gap of 1 year, 1 month, and 8 days.
Carlos De León stopped Sammy Reeson via TKO in the 9th round of the 12-round world-title fight. León improves his record to 45-5 (30 KOs)
On July 17, 1983, Carlos De León and S.T. Gordon met again in a rematch.
León came in to the fight on a 2-fight win streak with a 64% KO rate, and was fighting after a gap of 4 months and 11 days.
Carlos De León defeated S.T. Gordon via unanimous decision in the rematch and wins the WBC title. León improves his record to 35-3
On August 10, 1986, the 27-year-old WBC and The Ring cruiserweight world champion, Carlos De León (40-4, 26 KOs), faced Michael Greer, in a title defense fight.
León came in to the fight on a 1-fight win streak with a 59% KO rate, and was fighting after a gap of 4 months and 19 days.
Carlos De León stopped Michael Greer via TKO in the 8th round of the 12-round world-title fight, and successfully defended his WBC and The Ring cruiserweight titles. León improves his record to 41-4 (27 KOs)
On January 22, 1988, the 28-year-old WBC cruiserweight world champion, Carlos De León (43-4, 29 KOs), faced Jose Maria Flores Burlon, in a title defense fight.
León came in to the fight on a 4-fight win streak with a 61% KO rate, and was fighting after a gap of 5 months and 21 days.
Carlos De León defeated Jose Maria Flores Burlon via unanimous decision and successfully defended his WBC cruiserweight title. León improves his record to 44-4
On November 25, 1980, a 21-year-old Carlos De León (29-2, 21 KOs) got a shot at the WBC cruiserweight title held by 28-year-old American boxer Marvin Camel (36-2-2, 16 KOs).
León came in to the fight on a 14-fight win streak with a 67% KO rate, and was fighting after a gap of 4 months and 28 days. Camel was on a 1-fight win streak with a 40% KO rate, and fighting after a layoff of 7 months and 25 days.
Carlos De León defeated Marvin Camel via majority decision and wins the WBC title — in his first world-title fight. León improves his record to 30-2, while Camel adds a loss to his record at 36-3-2.
On June 2, 1984, the 25-year-old WBC and The Ring cruiserweight world champion, Carlos De León (37-3, 25 KOs), faced Bash Ali, in a title defense fight.
León came in to the fight on a 5-fight win streak with a 62% KO rate, and was fighting after a gap of 2 months and 24 days.
Carlos De León defeated Bash Ali via unanimous decision and successfully defended his WBC and The Ring cruiserweight titles. León improves his record to 38-3