For four innings on Wednesday night, Bartolo Colon was nearly unhittable.

He retired the first 14 batters he faced, needed just 32 pitches (26 strikes) to get through four innings and Atlanta looked like it wanted no part of being at Citi Field.

Just as quickly, though, Colon faltered in the seventh.

After giving up his first hit — an infield single with two outs in the fifth to Jace Peterson — and a pair of base runners in the sixth, Colon left the game with the bases loaded in the seventh.

Colon ended up surrendering three runs in 6¹/₃ innings, as Addison Reed allowed all three runners to score in a 6-3 loss.

“I didn’t see many good swings the entire night,” Collins said. “He was outstanding. … Just all of a sudden he gave up some hits. I went to a guy who was pitching brilliantly.”

The same could have been said of Colon, whose status for the postseason hasn’t been determined.

“I haven’t talked to anybody,” Collins said. “We’ve got business to attend to first.”

Lucas Duda has been trying to break out of the funk that has plagued him since he returned from the disabled list on Sept. 7.

Perhaps a double and a pair of walks in a 1-for-2 night was a positive sign for the first baseman, who entered the game in a 6-for-39 slump since returning from a bout of lower-back stiffness.

“He’s trying to get back in a groove a little bit,” Collins said before the game. “With him it’s reps. How many? I don’t have a number in mind. There’s nothing to really gauge it on. He hit early again.

“I hope he begins to catch fire here right now. This next week we’re going into two places that are great hitters’ parks [in Cincinnati and Philadelphia].”

Duda wasn’t the only Met to shake off a slide, as Travis d’Arnaud snapped an 0-for-18 drought with a single to center that sent Duda to third with no one out in the second. He went 2-for-4.

David Wright looked to have a key single when he tied the game in the seventh, but it didn’t stay that way for long.

Nevertheless, Wright continued his effectiveness at the plate since his return from the disabled list. He’s 12-for-34 with five doubles, a home run and six RBIs in his last nine games.

Juan Uribe, who suffered a deep chest bruise while diving for a ground ball on Sunday, was held out of the starting lineup again but came on to get a pinch-hit single to start the ninth.

“Having Juan down has hurt the past couple of days,” Collins said.

Carlos Torres remained out with a left calf strain. He is expected to go through fielding drills to see if he’s healthy enough to cover bases and return Thursday. … Daniel Murphy tied a career-high with his 13th homer of the season.

Yoenis Cespedes went into the game mired in a 4-for-26 slump.

“I don’t want to put it on one guy,” Collins said of Cespedes, who went 1-for-4 with a third-inning triple. “He eased the pressure on the other guys when he was red hot. We have to protect him. He’s been doing it for other guys, so we need to pick him up a little bit.”