BUENOS AIRES, Argentina--(BUSINESS WIRE)--Arcos Dorados (NYSE:ARCO), Latin America’s largest restaurant chain and the world’s largest McDonald’s franchisee, today announced the appointment of Sergio Alonso, 52, as its new Chief Executive Officer, effective October 1. Mr. Alonso succeeds Chairman and Chief Executive Officer Woods Staton, 65, who will remain as Executive Chairman. “Sergio has been a part of the McDonald’s system for nearly 30 years and has developed a track record of achieving op