The New York Mets did not sign right-hander Kumar Rocker, the 10th overall pick in the amateur draft, before Sunday’s 5 p.m. ET signing deadline.

“This is clearly not the outcome we had hoped for and wish Kumar nothing but success moving forward,” acting Mets general manager Zack Scott said in a statement. “We’re excited about the players we have signed and look forward to watching them develop and contribute to the organization in the years to come.”

Rocker, 21, whose dominance at Vanderbilt made him the most well-known college player in perhaps a decade, had an agreement in place to sign for $6 million after he slipped down draft boards earlier this month. But the deal fell apart following his physical examination as the Mets expressed concern over the health of Rocker’s arm, sources said.

Rocker’s agent, Scott Boras, said in a statement that his client is healthy.

“Kumar Rocker is healthy according to independent medical review by multiple prominent baseball orthopedic surgeons. Immediately upon conclusion of his collegiate season, he had an MRI on both his shoulder and his elbow. When compared with his 2018 MRIs, the medical experts found no significant change. Kumar requires no medical attention and will continue to pitch in the regular course as he prepares to begin his professional career,” he said.

The Mets’ agreement with their first-round draft pick Kumar Rocker is in limbo after the team expressed concerns with the right-hander’s pitching elbow during his physical examination, multiple industry sources told The Post.

Rocker’s camp disagrees with those concerns, citing the pitcher’s durability at Vanderbilt, leading to a stalemate as Sunday’s 5 p.m. signing deadline approaches.

Rocker, whom the Mets drafted 10th overall, had agreed to a $6 million signing bonus on draft day pending the physical. The two sides could either sign off on a smaller figure, part ways altogether, or move forward with the original deal if the Mets determine that he’s worth the risk.

If an agreement can’t be reached, Rocker could return to Vanderbilt for his senior year, aim to get selected even higher in 2022 and earn outside money through the NCAA’s name, image and likeness allowance in the meantime.

Kumar Rocker entered 2021 as the consensus top Draft prospect and has excelled over his first seven starts. He won all seven with a tidy 0.84 ERA, posting a .137 opponents’ average and a 61/12 K/BB ratio in 43 innings.

Fellow Vanderbilt right-hander Jack Leiter has been even better. He no-hit South Carolina for nine innings in his first career Southeastern Conference start and Missouri for seven innings before departing in his second. He also has seven wins in as many starts, and his numbers verge on the ridiculous: 0.43 ERA, .074 opponents’ average, 71/16 K/BB ratio in 42 innings.

“It’s like watching Mickey Mantle and Roger Maris from 1961,” an area scout who covers Vanderbilt said. “It’s two guys who are clearly elite in their field.”