Robert Guerrero has six losses against six opponents on his boxing record. For a list of Guerrero's best fights, refer to "Best fights of Robert Guerrero".
On July 15, 2017 Robert Guerrero faced off against Omar Figueroa Jr. at age 34. He was coming in with a record of 33-6-1 (18), and Figueroa Jr. was 27 years old and with a record of 26-0-1 (18). Guerrero lost the fight via 3rd-round TKO.
On August 27, 2016 Robert Guerrero faced off against David Emanuel Peralta at age 33. He was coming in with a record of 33-5-1 (18). Guerrero lost the fight via 12-round split decision.
On January 23, 2016 Robert Guerrero fought Danny García in a welterweight world-title fight for the WBC title. Guerrero was 32 years old and with a record of 33-4-1 (18), and García was 27 years old and with a record of 31-0 (18). Guerrero lost the fight via 12-round unanimous decision.
On March 7, 2015 Robert Guerrero fought Keith Thurman in a welterweight world-title fight for Thurman's WBA title. Guerrero was 31 years old and with a record of 32-3-1 (18), and Thurman was 26 years old and with a record of 24-0 (21). Guerrero lost the fight via 12-round unanimous decision.
On May 4, 2013 Robert Guerrero fought Floyd Mayweather Jr. in a welterweight world-title fight for the WBC and The Ring titles. Guerrero was 30 years old and with a record of 31-2-1 (18), and Mayweather Jr. was 36 years old and with a record of 43-0 (26). Guerrero lost the fight via 12-round unanimous decision.
On December 2, 2005 Robert Guerrero faced off against Gamaliel Díaz in a featherweight bout at age 22. He was coming in with a record of 16-1-1 (9), and Díaz was 24 years old and with a record of 19-5-2 (9). Guerrero lost the fight via 12-round split decision.
