Denver Nuggets rookie Michael Porter underwent a second lumbar surgery, just a few months after having a microdiscectomy. Details on the second surgery are scarce, but it likely was one of two things. The first, and more likely possibility, is that there was recurrent or residual disc material near the nerve, and Porter was having ongoing symptoms that were not resolving. This surgery would be very similar to the initial microdiscectomy, and will set his timeline back. Return to play would probably be around 3-6 months. The second possibility for the surgery is that he had a spinal fluid leak. Surgery for this is rare, but sometimes necessary (this is the surgery that Steve Kerr required twice). This has a shorter timeline to return to play, likely 6-8 weeks.