Complex sentence: A professional competitor since 1997, Buentello has also formerly competed in the UFC, Bellator, Strikeforce, Affliction, King of the Cage, Shark Fights, and is the former King of the Cage Heavyweight Champion.
Split into simpler sentences: A professional competitor since 1997, Buentello has also formerly competed in the UFC, Bellator, Strikeforce, Affliction, and King of the Cage. Buentello is also the former King of the Cage Heavyweight Champion.