Interleague Play Changes Next Season Michael Weiner, the executive director of the players association, confirmed that, starting next season, teams will no longer play six games against the same interleague opponent every year. Weiner said that traditional rivals (Yankees-Mets, Cubs-White Sox, Dodgers-Angels, and so on) would play a single three-game series each season, or home-and-home series of two games each. Explaining the reason for the reduction, Weiner cited the Mets, the only team in the National League that has had to play six games each year against the Yankees, who are traditionally strong. "The reduction of the number of traditional rivalry games was a function of fairness," he said. Whether we end up at three or four is a function of mechanics. The Houston Astros are moving to the A.L. West next season, so each division can have five teams. Weiner said every team would play six interleague series per year - five against a corresponding division in the other league, plus one against a traditional rival. In years when the A.L. East plays the N.L. East, for example, Weiner said the Yankees and the Mets would still play each other six times.