Celtics forward Oshae Brissett has declined his $2.5 million player option to become an unrestricted free agent. Brissett, who averaged 3.7 points and 2.9 rebounds in 11.5 minutes per game last season, seeks a larger role on another team. His departure opens opportunities for other players like rookie Jordan Walsh on the Celtics' roster. Meanwhile, the Chicago Bulls have initiated a full-scale rebuild, trading Alex Caruso for Josh Giddey and potentially seeing star player DeMar DeRozan leave in free agency, along with other key players like Andre Drummond and Nikola Vucevic.