CHICAGO (AP) ― Chicago Bulls superstar point guard Derrick Rose is out indefinitely because of torn cartilage in his right knee that will require surgery, the team said Saturday.

The former MVP has a medial meniscus tear. The timetable for his return was not immediately clear.

Rose had an MRI in Los Angeles on Saturday after he was injured the previous night at Portland.

The three-time All-Star sat out last season recovering from a torn anterior cruciate ligament in his left knee. Now, it’s his other knee that’s injured. The injury occurred in the third quarter against the Trail Blazers.

Rose lost his footing while trying to change direction to get back on defense when Nicolas Batum stole a pass from Joakim Noah and started the other way. Rose limped across the court and couldn’t put any weight on his knee. After the Blazers scored, he came out of the game during a timeout.

It didn’t appear there was any contact on the play. Rose was unable to return and was on crutches afterward. He will not accompany the Bulls for the remaining four games on their six-game trip.

Even though the injury isn’t as serious as a torn ACL, losing Rose for any chunk of time is obviously a huge blow for a team expecting to challenge LeBron James and the Miami Heat for supremacy.