What is the name of the boxer who fought in the 2009 Fight of the year and retired from boxing in 2011?
Juan Manuel Márquez vs. Juan Díaz II: Juan Manuel Márquez vs. Juan Diaz was a boxing lightweight title superfight, in a rematch of the 2009 Fight of the Year. Juan Díaz (boxer): Juan Díaz (born September 17, 1983) is an American professional boxer who held the unified WBA (Super), IBF, and WBO lightweight titles in 2008. Juan Díaz (boxer):  He announced his retirement from boxing in 2011 to attend the University of Massachusetts Dartmouth Law School, but returned to the sport in 2013.
Juan Díaz