NEW YORK — The Dodgers’ lack of pitching hasn’t hurt them often this postseason. But in the third inning on Tuesday night, manager Dave Roberts stood in the dugout without many appealing options. Not only were the Dodgers running their fourth bullpen game of the postseason in Game 4 of the World Series, trying to complete a sweep of the New York Yankees to seal the franchise’s eighth championship, but they were doing it with more limitations than normal. Winning the first three games of this series forced Roberts to ride his bullpen heavily, especially his two highest-leverage relievers Michael Kopech and Blake Treinen.