HALLANDALE BEACH, Fla. – It was back to serious work for Mucho Macho Man early Saturday morning, with the reigning Breeders’ Cup Classic winner breezing an easy half-mile over a very fast track in 46.91 seconds under regular exercise rider Nick Petro Jr. It was his first work since cruising to an easy-as-can-be victory in the Sunshine Millions Classic that was little more than a public workout three weeks earlier.