The National League East race isn’t over just yet.

For the second night in a row, the Mets gained ground on the division-leading Philadelphia Phillies with a head-to-head victory — this time in walk-off fashion.

Brandon Nimmo’s game-ending RBI single in the bottom of the ninth capped a 6-5 win at Citi Field.

Nimmo’s tie-breaking, bases-loaded hit was the Mets’ fourth consecutive single against Phillies closer Jhoan Duran, who did not record an out.

The Mets now trail the Phillies by five games in the NL East with 30 to play.

The walk-off allowed the Mets to escape with a win on a night Ryan Helsley blew another late lead.

The Mets were up, 5-3, when Helsley entered to pitch the eighth, but that lead quickly evaporated when the hard-throwing right-hander issued a one-out walk to Nic

See Full Page