Here's what we know about the Celtics summer league roster so far, which will begin play in Utah on July 6:
Celtics snag one of most in demand un-drafted FA's for summer league team - Texas swing forward Jonathan Holmes. — Mark Murphy (@Murf56) June 27, 2015
DraftExpress slotted Holmes at No. 33 in their final mock draft, and has him at No. 23 on their list of top 100 prospects.
The Boston Celtics have invited Chris Babb and Omari Johnson to play for their summer league team, a league source tells D-League Digest.