Wiber Marrero, who is a personal trainer at Intense Warehouse Fitness in Kendall, popped his MMA cherry last December at the American Airlines Arena during the Mixed Fighting Alliance's There Will Be Blood promotion. The former Army Ranger, who boasts black belts in jujitsu and kickboxing, dropped opponent Ronald Peña with a wicked roundhouse kick to the head 23 seconds into the first round. The chiseled brute's impressive KO sent Peña to the emergency room with a broken jaw and a handful of teeth.