I don't think it's something JJJ can "learn." He isn't athletic enough to be a rotation guy for a contender in the NBA. Not a terrible thing, just reality... can see it from watching 1:00 into his "highlight video" on youtube. He's not strong enough to play with a wide stance and defend/rebound, he's not athletic enough to move laterally with SFs and guards, and there isn't a shooting percentage high enough to negate those deficiencies... especially not on a slow, defensive-oriented contender.