Marcos Maidana has five losses against four opponents on his boxing record. For a list of Maidana's best fights, refer to "Best fights of Marcos Maidana".
On September 13, 2014 Marcos Maidana fought Floyd Mayweather Jr. in a welterweight world-title fight for Mayweather Jr.'s WBA (Super), WBC and The Ring titles. Maidana was 31 years old and with a record of 35-5 (31), and Mayweather Jr. was 37 years old and with a record of 46-0 (26). Maidana lost the fight via 12-round unanimous decision.
On May 3, 2014 Marcos Maidana, the WBA champion, met Floyd Mayweather Jr., the WBC and The Ring champion, in a welterweight world-title unification fight. Maidana was 30 years old and with a record of 35-4 (31), and Mayweather Jr. was 37 years old and with a record of 45-0 (26). Maidana lost the fight via 12-round majority decision and lost his title.
On February 25, 2012 Marcos Maidana faced off against Devon Alexander at age 28. He was coming in with a record of 31-3 (28), and Alexander was 25 years old and with a record of 22-1 (13). Maidana lost the fight via 10-round unanimous decision.
On December 11, 2010 Marcos Maidana fought Amir Khan in a super-lightweight world-title fight for Khan's WBA title. Maidana was 27 years old and with a record of 29-2 (27), and Khan was 24 years old and with a record of 23-1 (17). Maidana lost the fight via 12-round unanimous decision.
On February 7, 2009 Marcos Maidana fought Andreas Kotelnik in a super-lightweight world-title fight for Kotelnik's WBA title. Maidana was 25 years old and with a record of 25-1 (24), and Kotelnik was 31 years old and with a record of 30-2-1 (13). Maidana lost the fight via 12-round split decision.
