https://yestino.com/entities/former-boston-celtics-00fcaeEvery event involving Former Boston Celticsenhttps://yestino.com/events/former-boston-celtics-big-man-jared-sullinger-announces-reti-a108bbhttps://yestino.com/events/former-boston-celtics-big-man-jared-sullinger-announces-reti-a108bbSat, 05 Sep 2026 17:22:49 GMT"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. Sources: Yahoo Sports