Isaiah Thomas' recovery from his hip injury could keep him out until the All-Star break, according to TheAthletic.com.
The status of Thomas' hip was the holdup in the deal that brought Kyrie Irving to the Celtics. The Cavaliers had concerns over Thomas' injury after his physical a week ago in Cleveland, which led to the weeklong delay in the trade that sent Thomas, Jae Crowder, Ante Zizic, the first-round 2018 draft pick via Brooklyn and an additional 2020 second-round pick being finalized.
The 2020 second-rounder, via Miami, was added by the Celtics to push the deal through.
From the Athletic story by Cavs beat writer Jason Lloyd:
No one is willing to put a timeline on when Thomas might return to the court. The fact he isn't running yet certainly is not a good sign. One source with experience dealing with the type of hip problems Thomas is facing predicted it could be January or even the All-Star break before Thomas returns to game action. That doesn't leave much time for a new player to establish chemistry and rhythm with a team trying to compete for a championship.
Celtics president of basketball operations Danny Ainge said when the deal was first announced that Thomas' availability for at least the start of the regular season was up in the air.