One day after agreeing to sign with the Miami Heat, former Celtics big man Kelly Olynyk said goodbye to the city of Boston in a heartfelt Instagram post.

"Boston, thank you for embracing a kid from Kamloops as one of your own over these past four years," Olynyk wrote. "I leave the city with the utmost respect and admiration for the support you have shown me. It was an honor to go out and play for you every single night. I am excited for what lies ahead, but I will never forget the people in Boston! Thank You!"

Fittingly, Olynyk used a photo from the epic Game 7 performance that ranked as the peak of his time in Boston.

In addition to his on-court production, Olynyk appeared at so many community events and embraced them so much that some Celtics staffers began calling him the GOAT of community events. Not every adult gets this excited about a children's carnival:

Like Avery Bradley, Olynyk was also a beloved teammate.

"His personality," Jaylen Brown said after learning of Olynyk's reported four-year, $50-million contract with the Heat. "You know how Kelly is. Slow-motion. You know how Kelly is, man. That's the big bro to us."

"Kelly, that's my guy," Brown added. "I was happy for him. I texted him right away, called him. He's excited, man. I thought he probably should have gotten a little bit more money but you know how that goes. He had a good year, he had a really good year, had a big Game 7 against Washington, had a great year. Probably should have been starting. He is a starter but he came off the bench for us and he played really well all year on a good team so I'm happy for Kelly. Miami has a good team and I wish him nothing but the best."