In the fourth game of the 2015 NLCS, Duda batted in five runs to help the Mets sweep the Chicago Cubs and advance to the 2015 World Series. His five RBI was tied for the most by a Mets player in a single postseason game, a feat previously accomplished by Curtis Granderson in the 2015 NLDS, Carlos Delgado in the 2006 NLCS, Edgardo Alfonzo in the 1999 NLCS and Rusty Staub in the 1973 World Series.