Juan Lagares went to Terry Collins after Thursday’s game and said he couldn’t continue playing with his injured left thumb.

So the Mets on Friday placed Lagares on the 15-day disabled list and announced that he will undergo surgery to repair the partial ligament tear he suffered while making a diving catch on June 4.

“He came in last night when the game was over and said, ‘I can’t keep playing like this. I can’t play with the condition of my thumb,’ ” Collins said. “So we got him in the training room and got the doctors together, and today it was decided that he’s going to need the procedure. He’ll be out six weeks, but I tip my cap to him because he gave a legitimate effort. He went out there and played like he always plays, with great desire and great heart. We’ll just have to fill in.”

Lagares hit .189 after injuring his thumb.

The Mets recalled Brandon Nimmo from Triple-A Las Vegas. Other than Yoenis Cespedes, all of their outfielders are lefthanded hitters, something general manager Sandy Alderson could rectify before the trade deadline.

Michael Conforto started in center and will get a chance to prove he deserves an everyday job, Collins said. He also said Alejandro De Aza will be his first choice against lefthanders. The Mets will face a lefty on Saturday night in Colorado’s Jorge De La Rosa.

Trainer’s room

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Cespedes (sore quadriceps) returned to the lineup, but Jose Reyes (rib cage strain) did not.

Collins, who indicated Reyes could go on the DL, said: “They put him through some tests today. He’s better — significantly better than the other day — but I just think because of that particular injury, we’ve got to be careful not to overdo it.”

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