The Dallas Cowboys do not officially retire numbers. However, no one has worn 74 since Bob Lilly retired and no one has worn 12 since Roger Staubach retired. It is unlikely any future player will wear #8. Correct, the Cowboys do not retire numbers, but no one has warn those numbers in the regular playing season. Numbers worn in pre-season are by rookies are not always their assigned numbers, but those numbers have been worn in summer camp, but not assigned in regular season. As there are only 98 numbers, they might be assigned in regular season in about 20 years.
As of the start of the 2007 season, the following uniform numbers have been retired by the Green Bay Packers:
1) 3 - Tony Canadeo
2) 14 - Don Hutson
3) 15 - Bart Starr
4) 66 - Ray Nitschke
5) 92 - Reggie White
Additionally, the Packers do not issue uniform number 5. Paul Hornung's number isn't "officially" retired (due, probably, to his 1-year gambling suspension), but it remains unused.
The most famous player to have worn number 44 for the Dallas Cowboys was fullback Robert Newhouse (1972-83). Others include Pro Bowl cornerback Don Bishop (1960-65), defensive back Cornell Gowdy (1986), defensive back Michael Brooks (1990), fullback Lincoln Coleman (1993-94), fullback Robert Thomas (1999-2002) and fullback Chris Gronkowski (2010).
Danny White. Wide receiver Cole Beasley.
Punter Mike Saxon wore No. 4 for the Dallas Cowboys from 1985 to 1992. Placekicker Shaun Suisham wore the number during his first tour of duty with the Cowboys in 2005 and 2006.
Wide receiver Roy E. Williams wore the number for the Dallas Cowboys from 2008 to 2010.
Teddy Williams
Linebacker Bruce Carter wears the number for the 2011 Dallas Cowboys.
Kevin Ogletree
Roger Staubach wore #12 during his career with the Cowboys.
Running back Marion Barber III wore No. 24 for the Dallas Cowboys from 2005 to 2010.
Bob Lilly wore # 74.
Harris, the great Dallas safety who was inducted into the Cowboys Ring of Honor in 2004, wore No. 43 from 1970 to 1979.
Quincy Carter wore No. 17.
22 was his number