Sheffield United have been taken over by COH Sports, the Championship club said on Monday, after the American consortium completed a buyout from Saudi Arabia's United World Group. COH Sports is led by Steven Rosen, founder and chairman of Resilience Capital Partners, and Helmy Eltoukhy, co-founder and chairman of biotech company Guardant Health. Both will join the United board as co-chairmen with immediate effect. "COH Sports, a group of successful entrepreneurs, business partners and friends,