As of 2013 he has won 2 Silver Medals at the Summer Olympic Games in the heavyweight division (Beijing 2008 and London 2012). He has also won 2 Gold Medals at World Amateur Boxing Championships (2007, 2013).
Brother-in-law of Italian judoka Giuseppe Pino Maddaloni. Pino won a Gold medal in the lightweight division at the 2000 Summer Olympics held in Sidney. Clemente's wife Laura Maddaloni and his other brother-in-law, Marco Maddaloni, are Italian judoka too.
His first daughter, Rosy was born on August 9, 2011.
His second and third daughters, twins Jane and Janet, were born on June 14, 2013.
On December 29, 2008, he married Laura Maddaloni in the Abbey of San Gennaro, in Cervinara (Campania, Italy).