Ricky Williams makes us forget about Lindsey Jacobellis.

The NFL's most mixed up talent (and that's saying a lot) appears to have to sunk his once promising career. Again.

Sources have told ESPN's Hank Goldberg that Miami Dolphins running back Ricky Williams' violation of the NFL's substance-abuse policy is not a matter of a missed test. Williams has failed a drug test, the sources said, the substance for which he tested positive is not known.

Denver television station KDVR first reported Sunday night that Williams had violated the NFL's substance abuse policy for a fourth time and faces a one-year suspension from the league.

The Miami Herald, citing two sources of its own, confirmed the station's report that Williams has violated the policy, although neither source would say whether Williams had failed a drug test or if he had missed a required test, which also is a violation.

An NFL spokesman told ESPN that the NFL had no comment on the report.

Williams has tested positive for marijuana three times and served a four-game suspension when he returned to the NFL last season following a one-year retirement.

Dolphins coach Nick Saban told ESPN he was not aware that Williams had tested positive and he was not allowed to comment, citing the confidential nature of the league's substance-abuse policy.

Dolphins spokesman Harvey Greene declined to comment when reached by the Herald on Sunday night.

"Because of the confidential nature of the league's substance abuse policy, we can't comment on any aspect of that program," Greene told the newspaper.

Williams was also fined the equivalent of four weeks' salary after his second and third violations of the NFL policy, in December 2003 and the 2004 offseason.

His mother, Sandy Williams, told the Palm Beach Post she would be "shocked" if her son would use marijuana again and strongly doubts that is the case.

Sandy Williams told the newspaper her son is currently in India and that they had not spoken of late. She speculated that he could have tested positive for a legal supplement he is taking in connection with his yoga studies.

I wouldn't know yoga from a tea party, but I doubt any drugs should be involved.

"I'll bet my life he's not smoking marijuana," she told the Post on Sunday. "He's so particular about what he puts in his body now. I would just be shocked. I just don't believe he's smoking weed."

"I'm thinking maybe it was one of his [legal] supplements for his yoga school. I really just don't believe he's smoking weed."

The love of a mother...You can't beat it, kiddies.

Williams abruptly retired from the NFL in July 2004 and the Dolphins fell apart, losing their first six games and finishing 4-12 -- their worst season since the 1960s.

At the time of his return, Williams was ordered to pay the Dolphins $8.6 million for breaching his contract, although there has been no financial resolution between him and the team. He was scheduled to be paid the league minimum of $540,000 last season, but was docked four games' pay due to his league-mandated suspension and was fined another four games in pay, reducing his take to $285,882.

Williams' base salaries for the two coming seasons are $545,000 and $670,000, the minimum for a player (he entered the league in 1999) of his NFL tenure.

Motivated partly by the need for a paycheck, he accepted Saban's offer to return for the 2005 season. When he reported at the start of training camp, Williams publicly apologized for the impact caused by his retirement and teammates unanimously embraced his return.