Perkins was hurt last week while working out at the team's practice facility in Waltham. He dislocated the same shoulder late in practice Feb. 8 and sat out 13 games before returning March 12 in a 106-101 win over Denver in Boston.
"We fully expect him back for the start of the season," although he may not be ready when training camp begins about a month earlier in early October, said Jeff Twiss, the Celtics' vice president of media services and alumni relations. "The surgery is more just to tighten the capsule around the [shoulder] joint."
The 6-foot-10 Perkins averaged 5.2 points and 5.9 rebounds this
season, his third since being taken by Boston with the 27th pick of the 2003 draft. After being drafted out of Ozen High School in Beaumont, Texas, he averaged 2.4 points and 2.7 rebounds in 70 total games in his first two seasons.