Adrenaline IV is slated to take place near Omaha, Nebraska at the Mid-America Center in Council Bluffs, Iowa, and is also expected to feature current UFC fighter Houston Alexander and veteran Jeremy Horn.
Sylvia (24-6), a former UFC heavyweight champion, is currently riding a three-fight losing streak, suffering a 9-second knockout to Ray Mercer in his most-recent fight in June after weighing in at an astonishing 310-pounds for the bout. “The Maine-iac” previously suffered back-to-back losses to Antonio Rodrigo Nogueira and Fedor Emelianenko in 2008.
Riley (6-1) won the NAAFS heavyweight title in his most-recent fight in April, defeating Justin Black via first-round knockout.
Pictured: Tim Sylvia