Rewind: PED Expert Patrick Arnold

Jack Encarnacao returned to The Sherdog Radio Network Sunday for another edition of "The Rewind." Joining Jack on this week's "Sunday Sitdown" was chemist Patrick Arnold. Arnold is an expert on the effects and chemistry of performance enhancing drugs. for over an hour Encarnacao and Arnold chat on the pros and cons of PED use in sports and the athletes that take them.

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