NEW YORK — Kris Medlen extended Atlanta's scoreless streak to 31 innings for its best string in more than 20 years, slumping Brian McCann drove in four runs with four hits and the Braves beat the New York Mets 11-3 on a stormy Saturday. A tornado touched down in Queens about 15 miles away several hours before the game. When the grounds crew struggled to control the billowing tarp before the first pitch, Braves reliever Jonny Venters pitched in to hold a flapping corner.