Nerlens Noel has been cleared for "limited on-court work" with the Philadelphia 76ers.
The rookie center is yet to make his debut for the team, having torn his anterior cruciate ligament during his final college season.
The 76ers' general manager, Sam Hinkie, said in a statement: "After careful consideration and numerous discussions with our medical and performance teams, the consulting physician and rehabilitation staff, and Nerlens' representatives, some of the restrictions on Nerlens have been lifted and he is now able to participate in limited on-court work.
"There are several benchmarks Nerlens still must meet, and during that time we will closely monitor his progress and regularly evaluate his status. Our goal remains the same, which is to give Nerlens every opportunity to ensure a long, productive NBA career."
The 19-year-old was picked sixth overall in the 2013 Draft.
