PORT ST. LUCIE — The idea that this spring was somehow going to be all business for Yoenis Cespedes was quickly shattered by the sound of him revving the engine of a new three-wheeled sports vehicle in the players parking lot Monday afternoon. After weeks of commuting to work in normal, at least normal-for-him, pickup trucks and SUVs, the Mets slugger who had a daily car show last spring, apparently opened the 2017 car season. He hopped into his Polaris Slingshot with white with black and blue trim, backed it out of his parking spot, revved the engines and then drove out of the complex Monday afternoon with photographers trailing him.