How did Tannehill recover in such timely fashion? His treatment and rigorous rehab involved adult stem cell treatment, Salguero added. Rapoport reported last month that Tannehill was considering possibly undergoing Regenokine, a form of platelet-rich plasma therapy made famous by Lakers star Kobe Bryant. Essentially, it takes a patient's blood, spins it to separate the platelets, then is re-injected into the knee.