Halladay allowed one run and walked one while striking out eight to lead the Phillies to their third straight victory. Philadelphia went 17-5 in April 1993.
The NL Cy Young award winner cruised in the beginning of the game- his first 18 pitches were all strikes before missing high with a fastball to Jose Reyes.
It was his seventh straight win over the Mets dating back to the 2006 season.
Mets starter Jonathon Niese (2-3) took the loss after Placido Polanco's sacrifice fly in the seventh broke a 1-1 tie.