Marlins closer Leo Nunez has been playing under an assumed name, according to two sources. The issue prompted him to return Thursday to his native Dominican Republic. One of the sources said Nunez's real name is Juan Carlos Oviedo and he's 29, a year older than listed in the team media guide. The Marlins placed Nunez on Major League Baseball's restricted list, and he isn't expected to pitch in the final week of the season.