Soon-to-be second-year guard E'Twaun Moore has a non-guaranteed team option in his deal and Ainge said his spot on the roster will likely be determined by how much progress he shows as part of the team's 10-game summer league slate in Orlando and Las Vegas.
"It's a big summer for E'Twaun," Ainge said. "He's under contract. He'll come into summer league and his performance will be huge for him."
The Celtics must decide after the final summer league game whether to guarantee the second year of Moore's deal, valued at $762,000.