Ricky Williams has earned his reputation as one of the oddest oddballs in NFL history, a perception that won’t change after you watch “Run Ricky Run,’’ Tuesday night's installment in ESPN’s “30 for 30” series.

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But the film, which offers behind-the-scenes footage of Williams shot by a friend, Sean Pamphilon, as his off-field saga unfolded, will give you a far greater understanding of the forces that formed him.

There even is a happy ending. For now.