"Defense was the last thing I taught them," Earl explained, "because you can make it without defense."

Earl wasn't wrong. The elder of the two brothers now admits that his father "taught me every fundamental that I know, especially my shooting technique." That jumper sustains his NBA career — but it doesn't define a successful one. You know the boy as J.R. Smith, a perplexing, polarizing player and personality. Smith is one of the last members of the NBA's much-debated prep-to-pro generation. He's made money in bunches, more than $25 million in his career, and he will find a team long after his athleticism erodes — like his father, he will always be able to shoot. But he's also defined by something that isn't tangible: untapped potential. Eight years into his star-crossed career, coaches and fans still don't know what to make of J.R. Smith.

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