Dr. Stephen G. Thon

Dr. Derek Purcell is a board-certified, fellowship trained orthopedic surgeon who specializes in sports medicine, with a concentration on conditions and injuries of the shoulder and knee.  His expertise is in advanced arthroscopic techniques for the shoulder and knee, complex knee ligament reconstruction, cartilage restoration, and joint replacement for the knee and shoulder. Dr. Purcell graduated Summa Cum Laude from the University of Alabama in Tuscaloosa.  After attending the University of Virginia School of Medicine, he completed his Orthopedic Surgery residence as well as Sports Medicine and Shoulder Fellowship at Barnes-Jewish Hospital/Washington University in St. Louis. During his fellowship, Dr. Purcell served as assistant team physician for the St. Louis Rams (NFL), Blues (NHL), and Cardinals (MLB).  He was a former member of the NFL Team Physicians Society.  He has served as a physician for the St. Louis Cardinals spring training camp in Jupiter, FL as well as assisted with the NFL Combine in Indianapolis, IN. In Colorado Springs, Dr. Purcell serves as a Team Physician for Colorado College Athletics.  He has also assisted with the care of multiple high school athletic teams.  He currently assists with Vista Ridge High School, Colorado Springs Christian School, and Cheyenne Mountain High School.  He is a member of the American Orthopedic Society for Sports Medicine and the American Academy of Orthopedic Surgeons. Dr. Purcell is rated as an Advanced provider by MediFind in the treatment of Trochlear Dysplasia. His top areas of expertise are Osteoarthritis, Bursitis, Tendinitis, Tenosynovitis, and Hip Replacement.

Dr. Thomas Mann is a fellowship-trained sports medicine specialist who joined Cornerstone Orthopedics & Sports Medicine, a division of OCC, in 2000. He is a fellow of The American Orthopedic Society for Sports Medicine, the leading organization for sports medicine in the U.S. Dr. Mann graduated with honors from Jefferson Medical College in Philadelphia, where he was elected to the Alpha Omega Alpha Medical Honor Society. He completed his orthopedic residency at Penn State University, followed by a Sports Medicine Fellowship at Ohio State University, gaining advanced training in arthroscopic surgery and team coverage across multiple sports, including football, soccer, hockey, and gymnastics. His experience includes work with teams such as the Columbus Chill, Hershey Bears, and the U.S. Under-17 Soccer Team during a European tour. Locally, he has provided sideline coverage for Ralston Valley High School Football for over five years. Dr. Mann is also committed to community service, volunteering with Habitat for Humanity, Denver Hands for Hope, and serving regularly as a camp doctor and committee member with Young Life Central Denver. Dr. Mann is rated as an Advanced provider by MediFind in the treatment of Trochlear Dysplasia. His top areas of expertise are Tendinitis, Tenosynovitis, Synovitis, and Bursitis.

Kimberly Pengel is an Orthopedics specialist and a Pediatrics provider in Lone Tree, Colorado. Dr. Pengel is rated as an Advanced provider by MediFind in the treatment of Trochlear Dysplasia. Her top areas of expertise are Sandhaus Ben-Ami Syndrome, Small Patella Syndrome, Trochlear Dysplasia, and Caffey Disease.