According to co-manager Rich Ryan, undefeated Giovanni Lorenzo has been added to the big Arturo Gatti-Floyd Mayweather show in Atlantic City, New Jersey this Saturday. The 2000 Olympian, 17-0 as a pro, is matched against Ronald Weaver, 29-15-2. Lorenzo started off 2005 with an emphatic first-round knockout of then-unbeaten Dennis Sharpe, then went down to his home country, the Dominican Republic, to fight in a benefit to raise money for his ailing former trainer.