On November 3, 2007, the 24-year-old IBF featherweight world champion, Robert Guerrero (20-1-1, 13 KOs), faced Martin Honorio, in a title defense fight.
Guerrero came in to the fight on a 4-fight win streak with a 59% KO rate, and was fighting after a gap of 8 months and 11 days.
Robert Guerrero made quick work of Martin Honorio, stopping the challenger via TKO in the 1st. Guerrero improves his record to 21-1-1 (14 KOs)
On February 29, 2008, the 24-year-old IBF featherweight world champion, Robert Guerrero (21-1-1, 14 KOs), faced a 24-year-old Jason Litzau (23-1, 19 KOs), in a title defense fight.
Guerrero came in to the fight on a 5-fight win streak with a 60% KO rate, and was fighting after a gap of 3 months and 26 days. Litzau was on a 3-fight win streak with a 79% KO rate, and fighting after a layoff of 3 months and 6 days.
Robert Guerrero stopped Jason Litzau via KO in the 8th round of the 12-round world-title fight, and successfully defended his IBF featherweight title. Guerrero improves his record to 22-1-1 (15 KOs), while Litzau adds a loss to his record at 23-2.
On September 2, 2006, a 23-year-old Robert Guerrero (18-1-1, 11 KOs) got a shot at the IBF featherweight title held by Eric Aiken.
Guerrero came in to the fight on a 2-fight win streak with a 55% KO rate, and was fighting after a gap of 2 months and 10 days.
The champion refused to continue the fight in the 8th round, and Robert Guerrero is crowned the new IBF featherweight world champion — in his first world-title fight. Guerrero improves his record to 19-1-1 (12 KOs)
On November 24, 2012, a 29-year-old Robert Guerrero (30-1-1, 18 KOs) and a 29-year-old Andre Berto (28-1, 22 KOs) met in the ring in a welterweight bout.
Guerrero came in to the fight on a 14-fight win streak with a 56% KO rate, and was fighting after a gap of 3 months and 27 days. Berto was on a 1-fight win streak with a 75% KO rate, and fighting after a layoff of 1 year, 2 months, and 21 days.
Robert Guerrero defeated Andre Berto via unanimous decision in the 12-round welterweight fight. Guerrero improves his record to 31-1-1, while Berto adds a loss to his record at 28-2.
On February 23, 2007, 23-year-old Robert Guerrero (19-1-1, 12 KOs) and Spend Abazi fought for the vacant IBF featherweight title.
Guerrero came in to the fight on a 3-fight win streak with a 57% KO rate, and was fighting after a gap of 3 months and 19 days.
Robert Guerrero stopped Spend Abazi via TKO in the 9th round of the 12-round world-title fight. Guerrero improves his record to 20-1-1 (13 KOs)
On August 22, 2009, a 26-year-old Robert Guerrero (24-1-1, 17 KOs) got a shot at the IBF super-featherweight title held by Malcolm Klassen.
Guerrero came in to the fight on a 8-fight win streak with a 65% KO rate, and was fighting after a gap of 2 months and 10 days.
Robert Guerrero defeated Malcolm Klassen via unanimous decision and wins the IBF title. Guerrero improves his record to 25-1-1
On June 23, 2006, a 23-year-old Robert Guerrero (17-1-1, 10 KOs) and Gamaliel Díaz met in the ring for the 2nd time, in a featherweight bout.
Guerrero came in to the fight on a 1-fight win streak with a 52% KO rate, and was fighting after a gap of 1 month and 5 days.
In the rematch, Robert Guerrero stopped Gamaliel Díaz via KO in the 6th round. Guerrero improves his record to 18-1-1 (11 KOs)
On May 4, 2013, a 30-year-old Robert Guerrero (31-1-1, 18 KOs) got a shot at the welterweight WBC title held by 36-year-old Floyd Mayweather Jr. (43-0, 26 KOs).
Guerrero came in to the fight on a 15-fight win streak with a 54% KO rate, and was fighting after a gap of 5 months and 10 days. Mayweather Jr. was on a 43-fight win streak with a 60% KO rate, and fighting after a layoff of 11 months and 29 days.
Floyd Mayweather Jr. defeated Robert Guerrero via unanimous decision and successfully defended his WBC welterweight title. Mayweather Jr. improves his record to 44-0, while Guerrero adds a loss to his record at 31-2-1.
On July 28, 2012, a 29-year-old Robert Guerrero (29-1-1, 18 KOs) and Selçuk Aydın met in the ring in a welterweight bout.
Guerrero came in to the fight on a 13-fight win streak with a 58% KO rate, and was fighting after a gap of 1 year, 3 months, and 19 days.
Robert Guerrero defeated Selçuk Aydın via unanimous decision in the 12-round welterweight fight. Guerrero improves his record to 30-1-1
On April 9, 2011, a 28-year-old Robert Guerrero (28-1-1, 18 KOs) and a 30-year-old Australian boxer Michael Katsidis (27-3, 22 KOs) met in the ring in a lightweight bout.
Guerrero came in to the fight on a 12-fight win streak with a 60% KO rate, and was fighting after a gap of 5 months and 3 days. Katsidis was on a -1-fight win streak with a 73% KO rate, and fighting after a layoff of 4 months and 13 days.
Robert Guerrero defeated Michael Katsidis via unanimous decision in the 12-round lightweight fight. Guerrero improves his record to 29-1-1, while Katsidis adds a loss to his record at 27-4.