Timberwolves guard Brandon Roy is expected to miss the next month after undergoing arthroscopic knee surgery Monday.
The team in a statement called the surgery performed by team doctor David Fischer in Bloomington "successful," but didn't provide details about an exploratory operation that cleaned up Roy's right knee.
Roy retired last December because of degenerative knees, but he launched a comeback last spring after undergoing a medical procedure intended to reduce pain and post-exercise swelling in knees that have little or no cartilage left in them. Roy, 27, signed a partially guaranteed two-year, $10 million free-agent contract with the Wolves in July.
He has appeared in five games this season but has not played since leaving a Nov. 9 game against Indiana because of pain in his right knee that the team traces to Roy banging knees with a Milwaukee player in an Oct. 26 preseason finale.
The team's statement specified the one-month timeline. But with Roy's history of knee problems, there are no guarantees.
"From the very start, you knew it was going to be up and down," coach Rick Adelman said about Roy's attempt to play again. "It's too bad it's this. But I think he feels like this is worth doing, making sure everything's all right. You just have to go with it and hopefully when it's over with, he'll be able to come back."
Roy will miss Friday's game at Portland, which would have been his return to the Rose Garden, the arena where he played his way to three NBA All-Star Games in five seasons. He had purchased three suites for family and friends for the game but will donate them to charity instead, the Oregonian newspaper reported Monday.
Roy will spend Thanksgiving with family in Seattle instead, recuperating from his seventh knee operation since high school.