 Pulse of New Hampshire. The Boston Celtics announcing yesterday their 13-man roster for the NBA Summer League. Returning to the Celtics are J.D. Davidson, Drew Peterson, Namiah Skada, Jaden Springer, and Jordan Walsh. Incoming draftees Baylor Shireman and Anton Watson will be making their green debut. Summer League starts Saturday night against the Miami Heat. More Tuesday morning sports. Here's Chuck Freeman.