Marcos René Maidana (born 17 July 1983) is an Argentine professionalboxer and the former WBA welterweight champion. He currently has aprofessional record of 35–4, with his only professional losses coming againstAndreas Kotelnik, Amir Khan, Devon Alexander and Floyd Mayweather Jr., all by decision. He recorded his biggest win against Adrien Broner on December 14, 2013 in a contest that saw him knock Broner down twice en route to defeating him via unanimous decision and winning himself Broner's WBAWelterweight title in the process.
Light Welterweight
On February 2, 2009, the then-WBA Light Welterweight titleholder Andreas Kotelnik beat the then-undefeated Maidana (25-0, 24 knockouts) via controversial split decision, with the judges scoring the fight 115–114, 113–115, 115–113 in Kotelnik's favour.
Maidana's first fight in the United States was against Mexican-American Victor Ortíz, that took place on June 27, 2009. Maidana was knocked down three times within the first two rounds, but rallied and came back to beat Ortiz for the interim WBA super lightweight title with a sixth-round TKO victory.
After his fight with Ortiz, it was rumoured that Maidana would face British boxer, and WBA super lightweight champion, Amir Khan, who won the title after defeating Andreas Kotelnik.However, Khan opted for Paulie Malignaggi as his next opponent. As a result, Maidana was scheduled to fight on March 27, 2010 against Victor Manuel Cayo, whose record, at that time, was 24-0 with 75% of victories coming by way of knockout.Maidana knocked out the undefeated Cayo in the sixth round to retain his interim WBA super lightweight title and improve his record to 28-1, with 27 knockouts.
After failing to secure a fight with Timothy Bradley, Maidana fought and defeated DeMarcus Corley in August 2010. Despite knocking Corley down in the 7th round, Maidana had to go the distance for only the third time in his career, eventually securing the victory via unanimous decision (117–110, 117–110, 115–112).