Kelly Olynyk hit just 2-of-7 shots (0-of-2 from deep) for six points, seven rebounds, two assists and a block on Wednesday.
Coach Brad Stevens said Kelly Olynyk would "be tough to unseat" as the starting center.
Kelly Olynyk is expected to rest during Saturday's game.
Kelly Olynyk started at center and hit 3-of-5 shots (all 3-pointers) for 12 points, four rebounds, two assists and a block in 23 minutes on Wednesday.
Kelly Olynyk played well in the starting lineup against the Sixers on Monday, making 4-of-12 from the field for 14 points with nine boards, one steal and two 3-pointers.
Coach Brad Stevens said Kelly Olynyk is "clearly better" as a defender.
Kelly Olynyk scored 12 points and looked great in the process during Friday's scrimmage.
Kelly Olynyk was in the starting unit for the Celtics at practice on Thursday.
Coach Brad Stevens said on Wednesday that the best bet is to make Kelly Olynyk a big part of the Celtics.
Kelly Olynyk said his wrist injury is not an issue and he will full participate in training camp.
Kelly Olynyk confirmed that he is dealing with a wrist injury, but downplayed concerns.
Kelly Olynyk is expected to play for Canada's senior men's basketball team.
Kelly Olynyk put up 15 points, six rebounds, four assists, and two steals in Monday's loss to the Pacers.
Kelly Olynyk carried over his fantastic summer league play from last season into this summer with a 20-point game vs. the Heat on Saturday.