B.J. Penn It was right around Christmas that Greg Jackson, one of MMA’s most respected and busiest coaches, got a call from B.J. Penn . The UFC Hall of Famer had been hinting at a return to the UFC’s octagon, pushed by a simmering grudge with UFC lightweight Nik Lentz. But he was now serious about it.
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The story of how Greg Jackson came to work with B.J. Penn, and what comes next – MMA Junkie