Derek Jeter isn’t Kevin Long’s only project this winter. We learned earlier this month that Long and Jeter will work together in advance of spring training, but that doesn’t mean that Long has taken the rest of the winter off. In an article regarding Long’s and Jeter’s upcoming sessions, The Post’s Brian Costello reveals some of Long’s winter schedule. He’s worked with Nick Swisher and Colin Curtis, and plans to meet with Mark Teixeira next week before visiting Alex Rodriguez and Jorge Posada. That sounds like a pretty full slate. Baseball might be a seven-month sport for us, but for these guys it’s year round.