LAS VEGAS — The Celtics released their Summer League roster on Tuesday but made one major addition before Friday’s opener against the Grizzlies. Boston brought aboard free agent center Charles Bassey to the roster in a surprise move, as the big man joined Amari Williams and Kenneth Lofton Jr. as the team’s primary bigs in Las Vegas.

Paul Pierce shares his reaction to Cooper Flagg’s Summer League debut, breaking down how he looked in his first appearance and what it could mean for his future.

Eric Dixon, an undrafted rookie the Lakers brought in following last month's draft, will not take part in summer league play.