Sports Medicine & Orthopedic Surgery Specialist. Dr. Stephan Sweet is board certified by the American Board of Orthopaedic Surgery. www.sweetortho.com. (805) 648-4116. Book Online. Read More. Petros K. Frousiakis, DO. Sports Medicine & Orthopedic Surgery Specialist. Dr. Petros Frousiakis is an orthopedic surgeon in Ventura, California..