On July 31, 2010, Juan Díaz and Juan Manuel Márquez met again in a rematch.
Díaz came in to the fight on a 1-fight losing streak with a 44% KO rate, and was fighting after a gap of 7 months and 19 days. Márquez was on a -1-fight win streak with a 66% KO rate, and fighting after a layoff of 10 months and 12 days.
Juan Manuel Márquez defeated Juan Díaz via unanimous decision in the rematch and successfully defended his WBA (Super), WBO, and The Ring lightweight titles. Márquez improves his record to 51-5-1, while Díaz adds a loss to his record at 35-4.
On December 12, 2009, a 26-year-old Juan Díaz (35-2, 17 KOs) and a 29-year-old Paulie Malignaggi (26-3, 5 KOs) met in the ring for the 2nd time, in a super-lightweight bout.
Díaz came in to the fight on a 1-fight win streak with a 45% KO rate, and was fighting after a gap of 3 months and 20 days. Malignaggi was on a -1-fight win streak with a 17% KO rate, and fighting after a layoff of 3 months and 20 days.
In the rematch, Paulie Malignaggi defeated Juan Díaz via unanimous decision in the 12-round super-lightweight fight. Malignaggi improves his record to 27-3, while Díaz adds a loss to his record at 35-3.
On February 28, 2009, a 25-year-old Juan Díaz (34-1, 17 KOs) got a shot at the lightweight The Ring and WBO title held by 35-year-old Mexican boxer Juan Manuel Márquez (49-4-1, 36 KOs).
Díaz came in to the fight on a 1-fight win streak with a 48% KO rate, and was fighting after a gap of 5 months and 22 days. Márquez was on a 1-fight win streak with a 66% KO rate, and fighting after a layoff of 5 months and 15 days.
Juan Manuel Márquez stopped Juan Díaz via TKO in the 9th round of the 12-round world-title fight. Márquez improves his record to 50-4-1 (37 KOs), while Díaz adds a loss to his record at 34-2.
On March 8, 2008, the 24-year-old WBA (Super), IBF, and WBO lightweight world champion, Juan Díaz (33-0, 17 KOs), faced a 36-year-old Nate Campbell (31-5-1, 25 KOs), in a title defense fight.
Díaz came in to the fight on a 33-fight win streak with a 51% KO rate, and was fighting after a gap of 4 months and 24 days. Campbell was on a 3-fight win streak with a 67% KO rate, and fighting after a layoff of 8 months and 2 days.
Nate Campbell defeated Juan Díaz via split decision and wins the WBA (Super), IBF, and WBO titles — in his first world-title fight. Campbell improves his record to 32-5-1, while Díaz adds a loss to his record at 33-1.