MIAMI — The fate of the Mets season was decided Sept. 28, when they could not find a way to score on the Marlins .

But looming over the final day and the final weekend were the club’s actions on July 31.

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In the series that decided the season, what had been clear became official: The Mets did not have a strong trade deadline.

Gregory Soto imploded Friday.

Ryan Helsley became a lower-leverage arm used late Sunday. Cedric Mullins was out of the starting lineup Saturday and Sunday.

Tyler Rogers, generally excellent since coming over from the Giants, could not stop the bleeding in the fourth inning o

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