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Former NBA head coach George Karl joined The Herd with Colin Cowherd on Wednesday to discuss a bevy of topics, including how much of a problem performance-enhancing-drug use is for the league.

While Karl does not believe the NBA has a widespread PED problem, he does wonder if there is more than just training in the equation for some players that are able to play at a high-level late into their careers.

"With 500 players in the NBA, there is probably something going on," Karl said.

Karl goes on to elaborate on some of the more controversial aspects of his new book "Furious George: My Forty Years Surviving NBA Divas, Clueless GM's and Poor Shot Selection", as well as how the sport has evolved throughout his career.

Listen below.

 

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