Dallas Cowboys owner Jerry Jones, left, and coach Jimmy Johnson celebrating with the Super Bowl XXVIII trophy after defeating the Buffalo Bills 30-13 on January 30, 1994 at Atlanta's Georgia Dome. (AP Photo/Charles Krupa)

Dallas Cowboys quarterback Troy Aikman (8) celebrates his teammate Emmitt Smith's touchdown against the Pittsburgh Steelers in the third quarter at Super Bowl XXX on Sunday, Jan. 28, 1996 in Tempe, Arizona. (AP Photo/Michael S. Green)

Dallas Cowboys coach Barry Switzer gets soaked by Robert Jones (55) after the Cowboys beat the Pittsburgh Steelers 27-17 in Super Bowl XXX Sunday, Jan. 28, 1996, in Tempe, Ariz. (AP Photo/Eric Draper)

Dallas Cowboys quarterback Troy Aikman celebrates the Cowboys 30-13 Super Bowl win over the Buffalo Bills, Sunday, Jan. 30, 1994 at Atlanta's Georgia Dome in Atlanta. (AP Photo/Doug Mills)

Dallas Cowboys head coach Jimmy Johnson, left, hands Florida running back Emmitt Smith his No. 22 jersey as the Cowboys 1990 No. 1 draft pick is introduced at the Cowboys training facility in Irving, Texas, on April 22, 1990. (AP Photo/David J. Sams)

Dallas Cowboys wide receiver Michael Irvin, left, laughs during a news conference with Cowboys owner Jerry Jones after announcing Irvin had signed a three-year contract on Thursday, Sept. 5, 1992 in Irving, Texas, believed to make him the club's highest paid player. (AP Photo/David J. Phillip)

Dallas Cowboys' Emmitt Smith (22) flies over the goal line for a one-yard touchdown against the Jacksonville Jaguars defense of Jeff Lageman (56) Dave Thomas (41) and Tony Brackens (90) Sunday, Oct. 19, 1997, in Irving, Texas. (AP Photo/Bill Waugh)

Fullback Darryl Johnston of the Dallas Cowboys in an undated photo from 1990. (National Football League)

The Dallas Cowboys team photo on Media Day on January 25, 1994, for Super Bowl XXVIII in the Georgia Dome in Atlanta. (National Football League)

The Dallas Cowboys cheerleaders perform before Super Bowl XXX between the Dallas Cowboys and the Pittsburgh Steelers on January 28, 1996, at Sun Devil Stadium in Tempe, Arizona. (National Football League)

Dallas Cowboys players Chad Hennings (95), George Hegamin (69), Leon Lett (78), Kavika Pittman (97), Larry Allen (73), Tony Tolbert (97), Erik Williams (97), Darren Benson (91), and Russell Maryland goof around at Media Day on January 23, 1996, at Sun Devil Stadium in Tempe, Arizona. (National Football League)

Dallas Cowboys running back Emmitt Smith holds up an NFC championship t-shirt following the Cowboys 38-21 win over the San Francisco 49ers on Sunday, Jan. 23, 1994 in Irving, Texas. Smith and his teammates will meet the Buffalo Bills in Super Bowl XXVIII to defend their title. (AP Photo/Tim Sharp)

Dallas Cowboys wide receiver Michael Irvin answers questions following Super Bowl XXVIII, a 30-13 victory over the Buffalo Bills on January 30, 1994, at the Georgia Dome in Atlanta, Georgia. (National Football League)

Dallas Cowboys running back Emmitt Smith receives the Pro Set Offensive Rookie of the Year award during Super Bowl XXV week in Tampa, Florida in 1991. (National Football League)

Dallas Cowboys running back Emmitt Smith (22) tumbles into the end zone for a 15-yard touchdown carry ahead of Buffalo Bills cornerback Thomas Smith (28) during Super Bowl XXVIII, a 30-13 Cowboys victory on January 30, 1994, at the Georgia Dome in Atlanta. (National Football League)

Dallas Cowboys tackle Erik Williams (79) congratulates running back Emmitt Smith (22) for a 10-yard touchdown run during Super Bowl XXVII, a 52-17 victory over the Buffalo Bills on January 31, 1993, at the Rose Bowl in Pasadena, California. (National Football League)

President Clinton holds a Dallas Cowboys jersey bearing Emmitt Smith's number he received from the Cowboys running back, left, during a ceremony at the White House Tuesday Feb. 13, 1996 where the president honored the Super Bowl XXX champions. (AP Photo/Ruth Fremson)

Dallas Cowboys defensive tackle Leon Lett (78) congratulates linebacker Ken Norton Jr. (51) after Norton scored a nine-yard touchdown on a fumble recovery during Super Bowl XXVII, a 52-17 Cowboys victory over the Buffalo Bills on January 31, 1993, at the Rose Bowl in Pasadena, California. (National Football League)

Dallas Cowboys wide receiver Alvin Harper (80) takes his 35-yard reception all the way to the one-yard line during Super Bowl XXVIII, a 30-13 victory over the Buffalo Bills on January 30, 1994, at the Georgia Dome in Atlanta. (National Football League)

Dallas Cowboys defensive end Charles Haley (94) tries to get past Buffalo Bills tackle Howard Ballard (75) during Super Bowl XXVIII, a 30-13 Cowboys victory on January 30, 1994, at the Georgia Dome in Atlanta. (National Football League)

Dallas Cowboys Hall of Fame quarterback Troy Aikman (8) surveys the field during Super Bowl XXVIII, a 30-13 victory over the Buffalo Bills on January 30, 1994, at the Georgia Dome in Atlanta. (National Football League)

Dallas Cowboys running back Emmitt Smith (22) leaps over Tampa Bay Buccaneers free safety Harry Hamilton (39) as cornerback Ricky Reynolds (29) moves in on the play in Irving, Texas, on Oct. 7, 1990. (AP Photo/Ron Heflin)

Dallas Cowboys running back Emmitt Smith celebrates a second-quarter touchdown in the Cowboys 38-21 NFC championship win over the San Francisco 49ers on Sunday, Jan. 23, 1994 in Irving, Texas. (AP Photo/Linda Kaye)

Dallas Cowboys Daryl Johnston (48) congratulates teammate Emmitt Smith (22) after his fourth quarter touchdown at Super Bowl XXVIII in the Georgia Dome on Sunday, Jan. 30, 1994 in Atlanta. The Cowboys beat the Bills 30-13. (AP Photo/Susan Ragan)

Dallas Cowboys new head coach Barry Switzer (right) speaks at a news conference at the Cowboys facility after being named to the position by owner Jerry Jones on March 30, 1994 in Irving, Texas. Switzer replaces Jimmy Johnson, who left the team. (AP Photo/Ron Heflin)

The Dallas Cowboys' Super Bowl XXVIII Championship ring, left, is displayed with their Super Bowl XXVII ring in Irving, Texas, Monday, July 11, 1994. The new ring features four large marquis diamonds. The four diamonds are symbolic of the Cowboys' four Super Bowl victories, the last two back-to-back. (AP Photo/Ron Heflin)

Green Bay Packers linebacker Bryce Paup (95) tries to pull down Dallas Cowboys wide receiver Michael Irvin (88) in the second quarter during their NFC playoff game in Irving, Texas, Sunday, Jan. 8, 1995. Irvin pulled away to gain a few more yards. (AP Photo/David J. Phillip)

Dallas Cowboys' tight end Jay Novacek makes one of 11 catches against the Green Bay Packers in the first quarter of their NFC game at Texas Stadium, Jan. 8, 1995, in Irving, Texas. (AP Photo/David J. Phillip)

Dallas Cowboys offensive lineman Nate Newton in action against the Philadelphia Eagles during the NFC divisional playoffs at Texas Stadium in Irving, Texas in this Jan. 7, 1996 photo. (AP Photo/David Phillip)

Dallas Cowboys quarterback Troy Aikman (left) coaches former sumo grand champion Asahifuji how to pass during Friday, July 31, 1992 photo session at Oda Field in Tokyo. Aikman and the Cowboys were visited by Asahifuji and fellow sumo wrestler as they worked out for Sunday's Texas showdown with the Houston Oliers in the NFL American Bowl, a pre-season exhibition game at Tokyo Dome. (AP Photo/Katsumi Kasahara)

Dallas Cowboys wide receiver Michael Irvin (88) celebrates his first quarter touchdown as Daryl Johnston (48) comes runs toward him during the NFC Championship game Sunday, Jan. 14, 1996, in Irving, Texas. (AP Photo/Ron Heflin)

Dallas Cowboys star Emmitt Smith greets fans along with Mickey Mouse and other Disney characters Monday, Jan 29, 1995, at Disneyland in Anaheim, Calif., a day after his team beat the Pittsburgh Steelers in the Super Bowl. (AP Photo/John Hayes)

Dallas Cowboys Charlie Williams stops a punt from entering the end zone during the second quarter of their preseason game against the St. Louis Rams in Irving, Texas, Friday, Aug. 15, 1997. (AP Photo/Eric Gay)

Dallas Cowboys fan Tad Clements cheers as the Cowboys take the field against the San Francisco 49ers for the NFC championship, Sunday, Jan. 23, 1994 in Irving, Texas. Clements wears a shark hat and face paint in honor of Cowboys safety Kenny Gant. (AP Photo/David J. Phillip)