Brandon Roy won't be on the court for about a month. (Getty Images)

After missing the last four games with knee pain, Brandon Roy underwent successful arthroscopic surgery Monday. The Timberwolves sent out a press release saying the surgery was successful and Roy would be out for about a month:

Minnesota Timberwolves guard Brandon Roy underwent successful arthroscopic surgery today on his right knee. The surgery was performed by Timberwolves team orthopaedic surgeon Dr. David Fischer at the TRIA Orthopaedic Center in Bloomington, Minn.  Roy is expected to be out approximately one month.

“Brandon had been experiencing some right knee pain, dating back to Oct. 26, when he banged knees with a Milwaukee Bucks player in a preseason game,” said Timberwolves President of Basketball Operations David Kahn. “The pain became more pronounced on Nov. 9 during our game against Indiana. We fully support Brandon’s decision to have today’s arthroscopic procedure, and look forward to his return when he feels ready to play.”

So we're less than a month into his comeback and he's going to miss the next month of action. That's no fun.

Roy struggled with his scoring and defense but did show plenty of skills as a playmaker for his teammates. He was averaging a career-best 6.8 assists per 36 minutes in his return to the court but he was also shooting a career worst 31.4 percent from the field. Every efficiency and advanced stat you can look at with him showed a severe drop-off from even his last injury-riddled season in Portland.

After the first couple games, Roy had made comments about just needing his legs under him to get more comfortable on the court, but the lingering pain from a preseason knee bump with a player on the Milwaukee Bucks proved to be too much for right now.

With a fourth player for the Wolves out for two weeks or more, the Wolves can apply for an injury exception from the NBA. Kevin Love is scheduled back in a couple of weeks, Rubio is rumored to be back in about a month, and Chase Budinger is out three to four months after knee surgery.

The Wolves just waived Will Conroy and signed Josh Howard to add more depth to their wings. The move was made to get Andrei Kirilenko more rest each half.