First baseman Ryan Wheeler cut off Blackmon's throw to the infield and fired to third to try to beat trail runner Anthony Recker. The tag play was close enough for Weiss to challenge, but a review confirmed that the call was correct.
Morales struck out the next hitter, Ruben Tejada, to end the inning, but Duda's hit was the Mets' fourth in a three-run frame.
Thomas Harding is a reporter for MLB.com. Follow him on Twitter @harding_at_mlb. This story was not subject to the approval of Major League Baseball or its clubs.