Walsh (ribs) is available for Thursday's game versus the Pistons.
Walsh is questionable for Thursday's game against Detroit due to a left rib contusion.
Boston assigned Walsh to the G League Maine Celtics on Sunday.
Walsh never saw the floor in Tuesday's 120-117 home win over the formerly undefeated Cavaliers.
Walsh accumulated two points (1-3 FG, 0-2 3Pt, 0-1 FT), four rebounds, one block and two steals over 19 minutes during Monday's 123-93 victory over the Hawks.
Walsh will come off the bench for Tuesday's preseason game against the Raptors, Blake Murphy of Sportsnet.ca reports.
Walsh will start Sunday's preseason game against the Raptors, Blake Murphy of Sportsnet.ca reports.
Walsh won't start Game 1 of the opening-round series against the Heat on Sunday.
Walsh is in the starting lineup for Sunday's regular-season finale against Washington.
The Celtics recalled Walsh from the G League's Maine Celtics on Friday, Justin Turpin of WEEI.com reports.