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The moment is now. The New York Mets are ready to compete. Their contention window is wide open, as they have a competitive roster in place and a core to build around in the next few years.
They have a team strong enough to compete in the NL East, and while the Atlanta Braves and the Washington Nationals look very good (so do the Philadelphia Phillies, for that matter) the Mets will be fighting for a rotation spot.
Last season, despite its bittersweet ending, helped the team consolidate Jeff McNeil, Steven Matz, Seth Lugo and Amed Rosario as key contributors.