Luis Severino is leaving the Yankees, but not without a heartfelt goodbye to the organization in which he grew up.

After agreeing to a one-year, $13 million deal with the Mets on Wednesday night, Severino penned a goodbye note to the Yankees and their fans via his Instagram account on Friday.

The right-hander originally signed with the Yankees as a 17-year-old out of the Dominican Republic in 2011 and spent 12 years with the organization before hitting free agency.

“From the time I put on that special uniform and completed the journey of making my MLB debut in 2015, the Yankees organization and the city of New York welcomed my family and me into their hearts, [for] which we are forever grateful,” Severino wrote. “Together, we have all shared amazing memories that I will always cherish and it has truly been an honor and a privilege to have played for one of the greatest organizations in the world.”

Severino went on to thank the Steinbrenner family and general manager Brian Cashman, who also signed him to a four-year, $40 million extension in the spring of 2019 after being an All-Star in the previous two seasons.

He also thanked the medical and training staff, with whom he spent plenty of time over the last few years because of injuries, “for always having my best interest at heart.”

A beloved member of the Yankees clubhouse, Severino said his teammates will “always be family.”

“Despite not achieving our ultimate collective goal, I could not be more proud to have been your teammate and forever your brother,” Severino wrote. “While there are no guarantees in the future, I will always be proud to compete with you.”

Severino also used a separate post to thank “the greatest fans in the world.”

“This is not goodbye, it is simply I wish you all the best and hope to see you soon as I prepare for the next chapter of my career across town as a proud member of the New York Mets organization,” he wrote.

“I am thankful for this opportunity to remain a New Yorker and compete in the city I love.”