By Justin Barrasso Clark earned a unanimous decision, but how far will his MMA career go? View the original article to see embedded media. Opening RoundThe power of the fighting spirit was on full display this past Saturday in San Diego, as Zion Clark won his MMA debut. Clark defeated Eugene Murray by unanimous decision in a Gladiator Challenge bout, a remarkable feat for a man born without legs. Despite suffering from a rare birth disorder, the 25-year-old Clark has turned himself into an athletic phenomenon. He owns two different Guinness records—the highest box jump on two hands and running…