Pete Alonso, Michael Conforto go quiet when Mets need them most

As tough as losses are, the Mets’ 10-7 loss in the series finale against the Phillies on Sunday was as deflating as they come.

With a crucial opportunity in their pursuit for the postseason, as the Cubs — who currently occupy the second slot in the NL wild-card race — dropped back-to-back games to the Brewers, the Mets failed to take advantage.

Despite a handful of opportunities to maintain their 3-0 lead after the first inning or capitalize with runners in scoring position, the Mets’ usual go-to players didn’t get it done.

After the Phillies took a 10-6 lead in the seventh, Brandon Nimmo worked a 10-pitch walk before making it to third on an Amed Rosario single. Joe Panik drove Nimmo in…