Finally, we know what makes Ricky Williams tick. Sam Pamphilon and Royce Toni's ESPN doc Run Ricky Run chronicles the former Heisman Trophy winner's rise to fame, his fascination with marijuana, possible child abuse at the hands of his father and redemptive comeback.

Drafted by the Saints out of Texas in 1999 and traded to Miami, Williams led the league in rushing in 2002. Then he started failing drug tests. Rather than face a four-game suspension, Williams decided to forgo the the 2004 season altogether and went to Australia. By then he was smoking pot every day.

"The reason I smoked was to get myself some psychotherapy," he tells Pamphilon. "To go deeper into myself, really try to figure things out."

When Williams returned to the U.S., he moved to Grass Valley, California, where he studied at an ayurveda school and registered as a medical-marijuana patient. One of his stoner buds, Charlie D, recalls a particularly smokey poker game: "All my friends were amazed and surprised that he could keep smoking with us - probably 15, 16 joints."

In this scene, minus Williams, a bong and clear-paper joints are smoked. In another scene, Williams takes a couple of joint tokes for the camera.

Williams first smoked weed in high school in San Diego. "I knew I was never going to be a big smoker," he says. "Smoked a couple of times in college. But I never bought it - until I got to New Orleans... I became a smoker for three years."

Eventually, Williams stopped smoking pot and returned to the Dolphins after the NFL suspended him for the 2006 season. Now he believes he abused marijuana ("I was smoking too much").

"I used marijuana to deal with my imperfections," explains the philosophical footballer. "And it was illegal. But I still don't identify with being an addict."

Williams rejoining to the Dolphins in 2007 and has played well ever since. His life remains a paradox: while he continues to punish his body and other players on the gridiron, he seeks to cures others with holistic medicine.

"I don't even take pain medications," he says."I'll never try cocaine or any hard drugs."

Like his hero Bob Marley, Williams lives a pure life, with very few compromises, which is so rare in professional sports.

Ricky Williams' Last Season?
• "I've been seriously considering the upcoming season being my last season."
• "I know I said this'll be my last year, but I'm having second thoughts. With Ronnie (Brown) in the backfield and Coach (Tony) Sparano and the team doing well like they are now, it's still fun."

Watch Run Ricky Run Trailer + More Clips

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