Kevin Stone

Orthopedic surgeon Kevin Stone knows mobility means more than just where you go -- it's the foundation for a fulfilling daily life. (True whether you're an athlete or not.) His Stone Clinic specializes in "biologic knee replacement": replacing damaged joint parts, not with artificial components, but with lab-grown tissue and parts from human donors. He and team are spearheading new techniques that use animal tissue but avoid the complications associated with animal-to-human transplantations.

Stone has consulted publications such as The Wall Street Journal and Newsweek as a medical expert; he has contributed to TV programs such as ESPN's "Treating Athletes in the New Millennium" and The Discovery Channel.