The three-division champion Philippines' Casimero (30-4, 21 KOs), fighting in his United States televised debut, dropped Micah (24-1, 19 KOs) early in the second round with a left hook, and consistently used his right hand in devastating fashion to finish off the Brooklyn, N.Y.-trained Micah, a 2012 Ghanaian Olympian who suffered the first loss of his career.