WASHINGTON — The future of the Mets was on display Tuesday night in Washington D.C. For the first time, Brett Baty, Francisco Alvarez, Mark Vientos and Ronny Mauricio all found their names on the same big-league lineup card, with the four of them hitting consecutively from Nos. 5-8. They did not disappoint as the Mets routed the Washington Nationals 11-5 win at Nationals Park. “We’re baseball brothers,” Baty said.