In this episode of the Victory Over Injury Podcast, Dr. Michael Ryan  interviews Mark Calaway, aka The Undertaker, who just recently retired from the WWE at age 55.

The Undertaker is arguably the greatest professional wrestler of all time. In addition to measurable accolades, his reverence among his peers is unmatched, and sentiment across WWE culture and among fellow WWE superstars, past and current, follows that "there is no greater WWE star than The Undertaker."