On April 28, 2007, the 23-year-old WBA (Super) lightweight champion, Juan Díaz (31-0, 15 KOs), and the 31-year-old WBO lightweight champion Acelino Freitas (38-1, 32 KOs) met in a title-unification fight.
Díaz came in to the fight on a 31-fight win streak with a 48% KO rate, and was fighting after a gap of 5 months and 24 days. Freitas was on a 3-fight win streak with a 82% KO rate, and fighting after a layoff of 11 months and 30 days.
Acelino Freitas refused to continue the fight in the 8th round, and Juan Díaz is crowned the new WBO lightweight world champion. Díaz improves his record to 32-0 (16 KOs), while Freitas adds a loss to his record at 38-2.
On October 13, 2007, the 24-year-old WBA (Super) and WBO lightweight champion, Juan Díaz (32-0, 16 KOs), and IBF lightweight champion Julio Díaz met in a title-unification fight.
Díaz came in to the fight on a 32-fight win streak with a 50% KO rate, and was fighting after a gap of 5 months and 15 days.
Juan Díaz stopped Julio Díaz via TKO in the 9th round of the 12-round world-title fight and unified the WBA (Super), WBO, and IBF lightweight titles. Díaz improves his record to 33-0 (17 KOs)
On April 8, 2006, the 22-year-old WBA lightweight world champion, Juan Díaz (28-0, 14 KOs), faced a 28-year-old Puerto Rican boxer José Cotto (27-0, 19 KOs), in a title defense fight.
Díaz came in to the fight on a 28-fight win streak with a 50% KO rate, and was fighting after a gap of 8 months and 23 days. Cotto was on a 27-fight win streak with a 70% KO rate, and fighting after a layoff of 2 months and 19 days.
Juan Díaz defeated José Cotto via unanimous decision and successfully defended his WBA lightweight title. Díaz improves his record to 29-0, while Cotto adds a loss to his record at 27-1.
On July 15, 2006, the 22-year-old WBA lightweight world champion, Juan Díaz (29-0, 14 KOs), faced Randy Suico, in a title defense fight.
Díaz came in to the fight on a 29-fight win streak with a 48% KO rate, and was fighting after a gap of 3 months and 7 days.
Juan Díaz stopped Randy Suico via TKO in the 9th round of the 12-round world-title fight, and successfully defended his WBA lightweight title. Díaz improves his record to 30-0 (15 KOs)
On January 21, 2005, the 21-year-old WBA lightweight world champion, Juan Díaz (26-0, 12 KOs), faced Billy Irwin, in a title defense fight.
Díaz came in to the fight on a 26-fight win streak with a 46% KO rate, and was fighting after a gap of 2 months and 17 days.
Juan Díaz stopped Billy Irwin via TKO in the 9th round of the 12-round world-title fight, and successfully defended his WBA lightweight title. Díaz improves his record to 27-0 (13 KOs)
On November 4, 2004, the 21-year-old WBA lightweight world champion, Juan Díaz (25-0, 12 KOs), faced Julien Lorcy, in a title defense fight.
Díaz came in to the fight on a 25-fight win streak with a 48% KO rate, and was fighting after a gap of 3 months and 18 days.
Juan Díaz defeated Julien Lorcy via unanimous decision and successfully defended his WBA lightweight title. Díaz improves his record to 26-0
On July 17, 2004, a 20-year-old Juan Díaz (24-0, 12 KOs) got a shot at the WBA lightweight title held by Lakva Sim.
Díaz came in to the fight on a 24-fight win streak with a 50% KO rate, and was fighting after a gap of 3 months.
Juan Díaz defeated Lakva Sim via unanimous decision and wins the WBA title — in his first world-title fight. Díaz improves his record to 25-0
On November 4, 2006, the 23-year-old WBA lightweight world champion, Juan Díaz (30-0, 15 KOs), faced Fernando Angulo, in a title defense fight.
Díaz came in to the fight on a 30-fight win streak with a 50% KO rate, and was fighting after a gap of 3 months and 20 days.
Juan Díaz defeated Fernando Angulo via unanimous decision and successfully defended his WBA lightweight title. Díaz improves his record to 31-0
On August 22, 2009, a 25-year-old Juan Díaz (34-2, 17 KOs) and a 28-year-old Paulie Malignaggi (26-2, 5 KOs) met in the ring in a super-lightweight bout.
Díaz came in to the fight on a 1-fight losing streak with a 47% KO rate, and was fighting after a gap of 5 months and 25 days. Malignaggi was on a 1-fight win streak with a 17% KO rate, and fighting after a layoff of 3 months and 28 days.
Juan Díaz defeated Paulie Malignaggi via unanimous decision in the 12-round super-lightweight fight. Díaz improves his record to 35-2, while Malignaggi adds a loss to his record at 26-3.
On September 6, 2008, a 24-year-old Juan Díaz (33-1, 17 KOs) and a 28-year-old Australian boxer Michael Katsidis (23-1, 20 KOs) met in the ring in a lightweight bout.
Díaz came in to the fight on a 1-fight losing streak with a 50% KO rate, and was fighting after a gap of 5 months and 29 days. Katsidis was on a -1-fight win streak with a 83% KO rate, and fighting after a layoff of 5 months and 15 days.
Juan Díaz defeated Michael Katsidis via split decision in the 12-round lightweight fight. Díaz improves his record to 34-1, while Katsidis adds a loss to his record at 23-2.