The Boston Celtics started their roster trimdown on Tuesday by releasing training camp invites Malcolm Miller, Levi Randolph and Coty Clarke.

The trio could remain within the Celtics' organization if they accept assignments to the Maine Red Claws of the NBA Development League. A fourth camp invite -- Corey Walden -- remains on the roster as Boston closes out its exhibition slate with a back-to-back later this week.

-- ESPN Boston