Dr. Tracy Watson treats limb deformities, leg length discrepancies, nonunions, malunions and bone infections. He uses innovations such as Ilizarov external fixation to correct limb deformities, as well as technologies he helped develop, such as an implantable limb lengthening technique that uses magnets to gradually lengthen bones and a composite bone grafting technique that uses the patient's own bone-forming cells drawn through a needle, rather than harvesting large sections of bone.

His research interests include bone graft substitutes, biomechanics of implants in fracture repair and treatments for articular injuries and hip fractures.

Dr. Watson is a professor in the Department of Orthopaedic Surgery, Division of Orthopaedic Trauma, at Saint Louis University School of Medicine.

His professional affiliations include: the Orthopaedic Trauma Association for North America, National Trauma Institute and Foundation for Orthopaedic Trauma, and the Biologic Implants and Regenerative Medicine Committee of the American Academy of Orthopaedic Surgeons.