Mariano Natalio Carrera

Mariano Natalio Carrera (born July 22, 1980) is an Argentine boxer, who represented his native country at the 2000 Summer Olympics.

Professional career
Carrera began his pro career in 2001 and captured the WBA middleweight title by knocking out Javier Castillejo in 2006. Carrera tested positive for an illegal substance following the win over Castillejo, and the bout's result was officially overturned to a no-contest. His urine test was confirmed to have tested positive for the steroid Clenbuterol. He was stripped of the title, carrera is not officially recognized as a former world champion by the WBA. Castillejo and Carrera met in a rematch in 2007 and Castillejo knocked out Carrera in six rounds.