It was a lazy, humid weekday afternoon at Citi Field, and the early birds were taking a steam bath. Ed Kranepool, an original Met, was on the field near the Mets dugout, shaking hands, making the scene. Charlie Hayes, the old Yankee third baseman, was sitting on a cushioned field-level seat near third base. In a few hours, his son, Ke’Bryan Hayes, would be playing third and batting third for the visitors, the Pittsburgh Pirates. Nearby, on the field in foul territory, Jay Horwitz, Mets PR man since 1980, was doing the Jay Horwitz Pregame Shuffle, toes out, head bobbing, checking on this, checking on that.