"After a lifetime of giving everything I have to this game, it's time for me to officially step away from playing basketball," wrote Sullinger.

The former Boston Celtics draft pick will now fight for a spot on the Orlando Magic's roster ahead of the new season

Former Boston Celtics first-round pick Jared Sullinger announced his retirement from basketball on Friday, and he will now head back to his alma mater ( Ohio State) for the next phase of his career, working in player development. The Celtics wished Sullinger congratulations and good luck in a social media post which you can see below.

How the Celtics finish this season will depend on which breaks they get from a few players, and how a couple of others progress after last season.

The Boston Celtics could be in the mix for high-upside Duke forward Cameron Williams as a potential long-term addition to their frontcourt.

A mock trade has the Boston Celtics sending Paul George to the Portland Trail Blazers and reuniting with a former champion.

People might think roster changes are going to change the team's identity, but they're actually very suited to Joe Mazzulla's style

The Boston Celtics have built their teams in a number of ways over the decades, but few if any methods have born more fruit than through the NBA draft. The best players to suit up for the Celtics have, by and large, come to Boston either through being taken directly in the annual event, or via trades made that night.

"I think there needs to be a lot more people who are going out of their comfort zone, who ... use their platform for good," said Walsh.