CrossFit nation is introducing its latest athlete, six-time and four-division world champion boxer Robert “The Ghost” Guerrero (31-2-1, 18 KOs), who is returning to the ring on June 21 at StubHub Center in Carson, Calif. against Yoshihiro Kamegai (24-1-1, 21 KOs), and on display will be a physique molded by intense CrossFit training.

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