PHILADELPHIA — Jacob deGrom’s Cy Young award quest is going full-throttle.

With each start, inning pitched and earned run against him vital, the Mets ace pushed through a rain delay Saturday and kept going until he pitched all nine innings, firing 108 pitches and sealed the win.

DeGrom did not allow an earned run against the Phillies in a 3-1 victory at Citizens Bank Park that pushed his record above .500 after a series of letdowns by his lineup.

His final three pitches of the game — 98, 99 and 99 mph — were his fastest.

“I’m aware,” deGrom said. “I was looking at them.”

DeGrom (8-7) saw his earned run average drop from 1.81 to 1.71, still the lowest figure in the major leagues. Max Scherzer (2.11) and Aaron Nola (2.24) are behind deGrom among National League pitchers.

In a lost season, deGrom’s shot at the Cy Young award has become a Mets focal point.

“That is something that enters our mind,” manager Mickey Callaway said. “I think what we’re playing for is to make ourselves better every day, and if we can do that and continue to improve, we are going to help Jacob out in his quest.”

DeGrom said he was told by pitching coach Dave Eiland during a fourth-inning rain delay that if he didn’t return to the mound within 45 minutes he would probably be removed from the game.

Action resumed in 41 minutes, after deGrom had played catch in the bullpen and remained active.

Then, at 99 pitches after eight innings, deGrom asked for the ninth.

“I wanted to go out there,” he said. “I don’t know how many pitches I ended up with, but in Yankee Stadium [Monday] I threw 114, so I didn’t think I was quite there, but I definitely wanted to go back out there.”

The Phillies scratched for an unearned run against deGrom in the seventh, after Nick Williams and Maikel Franco delivered successive singles. Odubel Herrera followed with a grounder that should have been an inning-ending double play without the run scoring, but deGrom mishandled the return throw to first base. DeGrom, who received an error on the play, retrieved the ball and threw to Jeff McNeil, who tagged Herrera retreating to first base (it was ruled he had made the turn on the bag). Herrera was initially ruled safe at first base, but the call was overturned on a replay challenge by the Mets.

“I think it’s the same stuff we have seen all year,” Callaway said. “His ability to go out there and get ahead, attack them with his best stuff and when the game is on the line or a runner is in scoring position with a two-run lead he steps up and makes even better pitches.”

Devin Mesoraco’s solo homer in the seventh and McNeil’s RBI triple in the inning gave deGrom a 3-0 cushion.

Former Cy Young award winner Jake Arrieta provided resistance for the Mets, allowing one earned run on four hits over six innings.