Beltran offered to pay. Now he might be finding a bill in the mail soon, according to Niese.
Originally motivated by aesthetics, Niese got a nose job in October.
"He wanted me to have a new nose," Niese said about Beltran. "So he offered to pay for it. I was just like, 'All right.' Then it turned into seeing doctors and to getting it fixed."
An originally unintended byproduct of the rhinoplasty procedure is improved breathing, Niese said Monday, upon reporting to Mets camp.
"It's helped a lot with my running," he said. "It helps with my working out. As far as the mound, I'm not sure."
Niese, 25, ended last season on the disabled list with a strained intercostal muscle on his right side. He went 11-11 with a 4.40 ERA in 27 appearances (26 starts).
"I wouldn't consider myself a veteran," Niese said. "But it feels good to have a couple of years under my belt. Now it's just taking it easy and going about my business as usual."
Adam Rubin covers the Mets for ESPNNewYork.com.