The following is a press release from the Chicago Bulls:

The Chicago Bulls, guard Lonzo Ball and Klutch Sports announced today that Ball will undergo a cartilage transplant in his left knee. Ball will remain out indefinitely. Updates will be provided when appropriate.

On behalf of Lonzo Ball:

“My main focus has been on returning to the court and getting to a place where I can rejoin my teammates. This has been a frustrating process, but I’m confident these next steps are the best path forward. The support of my family, friends, fans and medical staff throughout my recovery is what keeps me moving forward. I can’t wait to get back to what I love doing most – playing basketball.”

On behalf of Chicago Bulls Executive Vice President – Basketball Operations Artūras Karnišovas:

“I continue to admire Lonzo’s perseverance throughout this journey. This has been a long and challenging road for him, and this decision has been a difficult one to make. The organization is behind him, and he has our full support. Our training and medical staff continue their commitment to Lonzo’s rehabilitation and to working with him throughout this next phase to ensure his healthy return to basketball.”

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According to ESPN's Adrian Wojnarowski, Ball will miss most of, if not the entire, 2023-24 season to recover from the procedure.