John Cale | Glenn Yarbrough | Jean Yarbrough | Hrvoje Čale | Yarbrough and Peoples | Cale Parks | Calé | John Cale's | James C. Yarbrough | Cedric Yarbrough | Cale Iorg | Cale Hulse |
Founded and operated by brothers Adam Singer and Rory Singer, The HardCore Gym has produced professional fighters such as former Ultimate Fighting Championship champion and The Ultimate Fighter season one winner Forrest Griffin, former World Extreme Cagefighting bantamweight champion Brian Bowles, upcoming heavyweight prospect Chris Barnett, former UFC fighter Cale Yarbrough, and others.