The Mets’ postseason pulse is faltering after a 4-3 defeat to Atlanta at Citi Field, extending a nine-of-10 skid that has trimmed a once-comfortable NL lead to a slim half-game edge for the final wild-card spot.

Solid outings like Kodai Senga’s 5.2 innings of two-run work are overshadowed by late bullpen collapses and defensive miscues, fueling a slide that has teammates and fans nervously watching as the schedule tightens. The upshot: Mets’ offense is scuffling to about three runs per game during the skid, and Mendoza’s decision-making is under the spotlight as they prep for a three-game set with Seattle, a team riding momentum and eyeing another hot stretch.

Across town, the Braves rode a multi-hit night from Michael Harris II and Ozzie Albies (Albies with the go-ahead RBI double) to erase an early deficit and remind bettors and fantasy players that this division race remains open. The looming question for fantasy managers is how long the Mets can weather this storm and whether Mendoza can steady the ship before the calendar flips to autumn baseball.