Complex sentence: Nicknamed "Black Panther", Gomez ruled the cruiserweight division from 1998-2001, successfully defending his WBC Cruiserweight Title twelve times, before finally vacating the title in February 2002 in order to move up to the Heavyweight ranks.
Split into simpler sentences: Nicknamed "Black Panther", Gomez ruled the cruiserweight division from 1998-2001, successfully defending his WBC Cruiserweight Title twelve times. He vacated the title in February 2002 in order to move up to the Heavyweight ranks.