He's got a lot of life ahead of him, but not necessarily a lot of NBA life.
And now a free agent with the depressing end to Boston's season, the Celtics center has to find out what he wants to do next.
His sister, Anna, posted a sentimental photograph on X shortly after the loss that of course many fans are trying to discern meaning from.
Given injuries, ages and salary cap restraints, there's no way this group can be fully staying together any longer.
Horford hasn't given any major indication of his intention yet.
The 6-foot-9 Horford is slated to speak to the media before his offseason begins in an exit interview, so we could learn more then.
Horford is coming off his 18th regular season. He's now spent seven years with the Celtics over time. And maybe, just maybe, there is a chance this is it.
The Florida legend may just wake up one day and decide to mix it up, but for now, he's still a great piece of the Celtics, if they decide to re-sign him.