Al Horford thanks Boston in social media post, feels bad for not winning championship

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Al Horford opted out of his contract with the Celtics and signed a four-year deal with the 76ers.

Horford spent three years with the Celtics and took to social media Wednesday to thank the Boston fans and also to note disappointment for failing to win a championship.

"You welcomed me with open arms three years ago," he wrote. "We had a goal to raise another banner in the rafters. We fell short of that goal. I appreciate everyone in Boston. Ownership, front office, coaches and teammates. Most important, thank you to all the fans. Thank you Boston!"

Thank you Boston! ☘️-- pic.twitter.com/0uNk2OcRvd

— Al Horford (@Al_Horford) July 10, 2019