Dr. Clarke completed his orthopedic surgery residency at Mayo Clinic, and a fellowship in Knee Surgery, with Dr. John Insall, at the Insall Scott Kelly Institute in New York. Dr. Clarke is the Chair of Orthopedic Surgery at the Mayo Clinic in Phoenix, USA where he specializes in knee replacement. He has lectured extensively about knee surgery and has authored more than 100 articles and book chapters. Dr. Clarke is the Deputy Editor for Hip & Knee for JAAOS. Dr. Clarke also serves as the Chair of Continuing Medical Education for the American Academy of Orthopedic Surgeons and Chair of the International Committee for ICJR.