Texas running back Ricky Williams poses with a New Orleans Saints jersey after the Saints made Williams their first pick in the NFL draft and the fifth pick in the draft overall Saturday, April 17, 1999, in New York. Williams won the Heisman Trophy in 1998. (AP Photo/Suzanne Plunkett)

New Orleans Saints first-round draft pick Ricky Williams, left, checks out his New Orleans Saints jersey as coach Mike Ditka, wearing a dreadlock wig, looks on Sunday, April 18,1999 in Kenner, La. The Saints traded all of their draft picks in 1999 and their first- and third-round picks in 2000 to Washington to get the Heisman Trophy winner. (AP Photo/Judi Bottoni)

New Orleans Saints running back Ricky Williams (34) dives over Atlanta Falcons linebacker Mark Simoneau (53) as he scores a fourth-quarter touchdown Sunday, Oct. 22, 2000, in Atlanta. (AP Photo/John Bazemore)

New Orleans saints running back Ricky Williams (34) looks on from the sidelines during an NFL football game against the Chicago Bears in Chicago, Illinois on October 8, 2000. (AP Photo/Scott Boehm)

Miami Dolphins new running back Ricky Williams, left, and head coach Dave Wannstedt hold up Williams' new number 34 jersey during a new conference on Monday, March 11, 2002 at the Dolphins training facility in Davie, Fla. The New Orleans Saints traded Williams to Miami for a first-round pick in 2002 and a third-round pick in 2003 that could become a first-rounder depending on how Williams performs. (AP Photo/Wilfredo Lee)

Miami Dolphins' Ricky Williams (34) runs against the Buffalo Bills during the second half of an NFL football game in Orchard Park, N.Y., Sunday, Sept. 12, 2010. The Dolphins won 15-10. (AP Photo/ David Duprey)

Miami Dolphins running back Ricky Williams (34) goes up over Detroit Lions cornerback Nathan Vasher (30) in the fourth quarter during an NFL football game in Miami, Sunday, Dec. 26, 2010. (AP Photo/Hans Deryk)

Miami Dolphins' Ricky Williams (34) tries to avoid New York Jets' Ray Mickens (24) on a 69 yard run for Williams in the first quarter Sunday, Dec. 28, 2003 in Miami. Mickens went on to tackle Williams. (AP Photo/Alan Diaz)

Miami Dolphins' Ricky Williams (34) goes airborne over Buffalo Bills' Nate Clements (22) as he is tackled by Bills' Takeo Spikes (51) during the first half of the game at Ralph Wilson Stadium in Orchard Park, N.Y., Sunday, Dec. 21, 2003. The Dolphins won 20-3. (AP Photo/David Duprey)

Miami Dolphins running back Ricky Williams signs autographs after afternoon practice at the Dolphins training facility in Davie, Fla., on Wednesday, July 30, 2003. (AP Photo/Richard Patterson)

Texas tailback Ricky Williams, winner of the 1998 Heisman trophy, gestures as he listens to a request from photographers as he holds a copy of the Heisman trophy Saturday, Dec. 12, 1998 at the Downtown Athletic Club, in New York. Williams ran for 2,124 yards and broke Tony Dorsett's 22-year-old record career rushing record as he led the Longhorns to an 8-3 record and a trip to the Cotton Bowl on Jan. 1. (AP Photo/Suzanne Plunkett)

Texas running back Ricky Williams, center, holds up the Longhorns sign as the Texas school song is played in Austin, Texas, Friday, Nov. 27, 1998. Williams rushed for 259 yards, making his the all-time rushing leader. Texas beat Texas A&M 26-24. (AP Photo/Eric Gay)

Texas running back Ricky Williams turns up field as he breaks the all-time NCAA rushing record with a 60-yard touchdown run against Texas A&M during the first quarter of an NCAA college football game in Austin, Texas, Friday, Nov. 27, 1998. (AP Photo/Eric Gay)

Texas running back and the 1998 Heisman Trophy winner Ricky Williams runs against Mississippi State in the Cotton Bowl in Dallas, Friday, Jan. 1, 1999. Williams finished with a school bowl-record 203 yards rushing on 30 carries in Texas' 38-11 win. (AP Photo/Linda Kaye)

New Orleans Saints running back Ricky Williams (34) runs past Minnesota Vikings defenders during the team's preseason game in San Antonio, Saturday, Aug. 11, 2001. (AP Photo/Eric Gay)

Texas great Ricky Williams hugs his mom Sandy Williams as his jersey is retired before the football game between Texas and Oklahoma St. in Austin, Texas, Sept 30, 2000. Texas head coach Mack Brown is in the background with the jersey. (AP Photo/Jim Sigmon)

New Orleans Saints Ricky Williams takes a break on the sideline in a game verse the Carolina Panthers on Sunday December 10, 2000 in Charlotte,N.C. CA. (AP Photo/Kevin Reece)

Baltimore Ravens running back Ricky Williams (34) runs the ball during an NFL football game against the San Francisco 49ers at M&T Bank Stadium in Baltimore, Thursday, Nov. 24, 2011. (Ben Liebenberg/NFL)

Baltimore Ravens running back Ricky Williams, left, tries to push away Cleveland Browns outside linebacker Kaluka Maiava as he rushes the ball in the second half of an NFL football game in Baltimore, Saturday, Dec. 24, 2011. (AP Photo/Nick Wass)

Miami Dolphins running back Ricky Williams signs autographs before an NFL football game against the San Diego Chargers Sunday, Sept. 27, 2009, in San Diego. The Chargers won 23-13. (AP Photo/Denis Poroy)

Miami Dolphins running back Ricky Williams (34) before an NFL football game between the Oakland Raiders and the Miami Dolphins in Oakland, Calif., Sunday, Nov. 28, 2010. (AP Photo/Tony Avelar)

Miami Dolphins running back Ricky Williams (34) in action during the fourth quarter of an NFL football game in Oakland, Calif., Sunday, Nov. 28, 2010. (AP Photo/Marcio Jose Sanchez)

Miami Dolphins running back Ricky Williams smiles during a news conference Monday, July 25, 2005 in Davie, Fla. (AP Photo/Steve Mitchell)

Miami Dolphins running back Ricky Williams #34 of the AFC races to the end zone against the NFC in the 2003 NFL Pro Bowl at Aloha Stadium on February 2, 2003 in Honolulu, Hawaii. (National Football League)

Ricky Williams of the Miami Dolphins bowls his way through the NFC for the first touchdown of the game in the first quarter of the Pro Bowl at Aloha Stadium in Honolulu Sunday, Feb. 2, 2003. (AP Photo/Reed Saxon)

Running back Ricky Williams #34 of the Miami Dolphins talks to the media after the game and accepts the award as Most Valuable Player in the 2003 NFL Pro Bowl at Aloha Stadium in Honolulu, Hawaii on February 2, 2003. (AP Photo/Paul Spinelli)

Ricky Williams, a collegiate football standout at the University of Texas and currently with the Miami Dolphins, during an interview Thursday, June 26, 2008, in Austin, Texas. He returned to Austin for the annual meeting of the Heisman Winners Association, 10 years after he won the trophy. (AP Photo/Harry Cabluck)