Dallas Cowboys wide receiver Michael Irvin kneels on the field before the start of Super Bowl XXVIII against the Buffalo Bills at the Georgia Dome in Atlanta, in this January 30, 1994 photo. Irvin, one of the NFL's great receivers, has been advised by doctors to stop playing football because of a spinal condition and plans to retire, the Fort Worth Star-Telegram reported Tuesday May 23, 2000. (AP Photo/David Longstreath)