On February 9, 2008, a 31-year-old Carlos Quintana (24-1, 19 KOs) got a shot at the WBO welterweight title held by 26-year-old American boxer Paul Williams (33-0, 24 KOs).
Quintana came in to the fight on a 1-fight win streak with a 76% KO rate, and was fighting after a gap of 4 months and 11 days. Williams was on a 33-fight win streak with a 72% KO rate, and fighting after a layoff of 6 months and 26 days.
Carlos Quintana defeated Paul Williams via unanimous decision and wins the WBO title — in his first world-title fight. Quintana improves his record to 25-1, while Williams adds a loss to his record at 33-1.
On June 24, 2006, a 29-year-old Carlos Quintana (22-0, 18 KOs) and a 21-year-old Colombian boxer Joel Julio (27-0, 26 KOs) met in the ring in a welterweight bout.
Quintana came in to the fight on a 22-fight win streak with a 81% KO rate, and was fighting after a gap of 4 months. Julio was on a 27-fight win streak with a 96% KO rate, and fighting after a layoff of 3 months and 30 days.
Carlos Quintana defeated Joel Julio via unanimous decision in the 12-round welterweight fight. Quintana improves his record to 23-0, while Julio adds a loss to his record at 27-1.
On August 26, 2005, a 28-year-old Carlos Quintana (20-0, 16 KOs) and Dillon Carew met in the ring.
Quintana came in to the fight on a 20-fight win streak with a 80% KO rate, and was fighting after a gap of 1 month and 14 days.
Carlos Quintana stopped Dillon Carew via KO in the 1st round. Quintana improves his record to 21-0 (17 KOs)
On May 5, 2012, a 35-year-old Carlos Quintana (28-3, 22 KOs) and Deandre Latimore met in the ring in a super-welterweight bout.
Quintana came in to the fight on a 1-fight win streak with a 71% KO rate, and was fighting after a gap of 1 year, 2 months, and 17 days.
Carlos Quintana stopped Deandre Latimore via TKO in the 6th round. Quintana improves his record to 29-3 (23 KOs)
On March 5, 2004, a 27-year-old Carlos Quintana (15-0, 12 KOs) and Edwin Cassiani met in the ring.
Quintana came in to the fight on a 15-fight win streak with a 80% KO rate, and was fighting after a gap of 3 months.
Carlos Quintana stopped Edwin Cassiani via KO in the 3rd round. Quintana improves his record to 16-0 (13 KOs)
On October 25, 2008, a 31-year-old Carlos Quintana (25-2, 19 KOs) and Joshua Onyango met in the ring.
Quintana came in to the fight on a 1-fight losing streak with a 70% KO rate, and was fighting after a gap of 4 months and 18 days.
Carlos Quintana stopped Joshua Onyango via TKO in the 4th round. Quintana improves his record to 26-2 (20 KOs)
On February 25, 2005, a 28-year-old Carlos Quintana (18-0, 14 KOs) and Nurhan Süleymanoğlu met in the ring.
Quintana came in to the fight on a 18-fight win streak with a 77% KO rate, and was fighting after a gap of 6 months and 1 day.
Carlos Quintana stopped Nurhan Süleymanoğlu via TKO in the 4th round. Quintana improves his record to 19-0 (15 KOs)
On September 29, 2007, a 30-year-old Carlos Quintana (23-1, 18 KOs) and Christopher Henry met in the ring.
Quintana came in to the fight on a 1-fight losing streak with a 75% KO rate, and was fighting after a gap of 9 months and 27 days.
Carlos Quintana stopped Christopher Henry via TKO in the 4th round. Quintana improves his record to 24-1 (19 KOs)
On May 20, 2004, a 27-year-old Carlos Quintana (16-0, 13 KOs) and Oscar Delgado met in the ring.
Quintana came in to the fight on a 16-fight win streak with a 81% KO rate, and was fighting after a gap of 2 months and 15 days.
Carlos Quintana stopped Oscar Delgado via TKO in the 1st round. Quintana improves his record to 17-0 (14 KOs)
On February 2, 2002, a 25-year-old Carlos Quintana (11-0, 9 KOs) and John Scalzi met in the ring.
Quintana came in to the fight on a 11-fight win streak with a 81% KO rate, and was fighting after a gap of 7 months and 17 days.
Carlos Quintana stopped John Scalzi via TKO in the 1st round. Quintana improves his record to 12-0 (10 KOs)