Jimmy Butler's injury to his left knee is not considered serious, sources told Anthony Slater of ESPN.

Butler suffered the injury during Tuesday night's loss against the Thunder. Butler missed the second half with the injury.

"I don't know anything more," Steve Kerr said after the game. "I didn't even know [he was out] until I was drawing up a play with a minute to go [before the second half] and somebody came in the huddle and said Jimmy is down."

Butler is listed as questionable for Thursday's game against the Sixers.

De'Anthony Melton is expected to make his season debut on Thursday.