April 1999 - Saints coach Mike Ditka trades his six draft picks in 1999 and two more the next year to Washington for the chance to draft Williams with the fifth overall selection.
Jan. 2, 2000 - Williams wraps up his rookie season with 884 yards rushing in 12 games.
Nov. 12, 2000 - On a 2-yard run that gives him exactly 1,000 yards in the 10th game of the season, Williams sustains a broken left ankle that will sideline him for the rest of the regular season.
Jan. 6, 2001 - Williams returns for the playoffs, but he gains only 14 yards on six carries in the Saints' 34-16 loss to Minnesota.
April 2001 - The Saints take Mississippi running back Deuce McAllister in the first round of the draft.
Jan. 6, 2002 - Williams closes the season with a career-best 1,245 yards rushing.
March 8, 2000 - Williams is traded to the Dolphins in exchange for a 2002 first-round pick and a conditional 2003 third-round pick, which later became a first-round choice. The teams also swapped fourth-round picks in the 2002 draft.
May 2002 - Williams fails a drug test and is placed in the league's substance-abuse program.
Sept. 8, 2002 - Williams rushes for 111 yards and two touchdowns in his Dolphins debut, a 49-21 victory over Detroit.
Dec. 1, 2002 - Williams sets a franchise single-game record with 228 yards rushing in a 38-21 loss at Buffalo.
Dec. 29, 2002 - Williams closes the season with 185 yards rushing against New England as he captures the NFL rushing title with a franchise-record 1,853 yards.
Dec. 28, 2003 - Williams' 73 yards rushing against the Jets gives him 1,372 yards for the season, the second-highest total in franchise history.
December 2003 - Williams tests positive for marijuana and second time and is fined four weeks pay.
July 23, 2004 - Williams calls then-head coach Dave Wannstedt a week before the start of training camp to tell him he is retiring.
July 29, 2004 - Reports surface of a third failed drug test, which would have resulted in a four-game suspension.
February 2005 - After talking to new Dolphins coach Nick Saban, Williams decides to return to football.
June 2005 - Williams is reinstated by the NFL but will be suspended for the first four games of the regular season.
July 2005 - Williams addresses the team prior to the start of training camp and apologizes for his sudden departure the previous year.
Oct. 16, 2005 - Williams makes his first regular season appearance and rushes for 8 yards on five carries in a loss at Tampa Bay.
Dec. 24, 2005 - With rookie Ronnie Brown sidelined by an ankle injury, Williams rushes for 172 yards in a 24-10 victory over Tennessee, his first 100-yard game of the season.
December 2005 - Williams fails another drug test, reportedly because of a substance other than marijuana.
February 2006 - A Denver television station reports the failed drug test.
April 10, 2006 - Williams appeals his latest failed drug test.
April 25, 2006 - The NFL denies Williams' appeal and suspends him for the 2006 season. Williams is eligible to apply for reinstatement for the 2007 season.