Raiders: Dr. David Chao explains Antonio Brown's foot issues

Former NFL team physician Dr. David Chao breaks down Antonio Brown's foot issues, what could've created such an odd situation and offers an opinion on whether this will impact the star receiver's 2019 regular season. Chao also explains how cryotherapy may have played a role in Brown's foot issues, and the conditions that compounded the issues that have kept him out of most Raiders training camp practices. Also, NBC Sports Bay Area's Scott Bair and Josh Schrock break down the Raiders start to training camp, including two joint practices against the Rams.

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