His interest in boxing began at age 12 , after he reported a stolen bike to a local police officer , Joe Martin , who was also a boxing trainer .
Ali was born January 17 , 1942 , in Louisville as Cassius Marcellus Clay Jr .
Ali 's interest in boxing began at age 12 , after he reported a stolen bike to a local police officer , Joe Martin , who was also a boxing trainer .
Ali was born January 17 , 1942 , in Louisville as Cassius Marcellus Clay Jr .