Deion Sanders, Mike Jenkins.
1961-1962: Glynn Gregory
1968: Dick Daniels
1972: Billy Parks
1974-1978: Doug Dennison
1984: Carl Howard
1987: David Adams
1988: Mark Higgs
1991: James Dixon
1995-1999: Deion Sanders
2001: Lynn Scott
2003: Derek Ross
2004-2005: Julius Jones
1991 - James Dixon 1994 - Alundis Bruce 1995-1999 - Deion Sanders 2001 - Lynn Scott 2003 - Derek Ross 2004-2007 - Julius Jones
Pac Man Jones wore # 21 in 2008.
Sanders wore No. 21 during his years with the Atlanta Falcons (1989-1993), the San Francisco 49ers (1994), the Dallas Cowboys (1995-1999) and the Washington Redskins (2000). He wore No. 37 during his two seasons with the Baltimore Ravens (2004-2005).
Mike Jenkins (CB) currently wears number 21 for the Dallas Cowboys.
Wide receiver Roy E. Williams wore the number for the Dallas Cowboys from 2008 to 2010.
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.
Linebacker Bruce Carter wears the number for the 2011 Dallas Cowboys.
Joseph Randle is number 21 on the Dallas Cowboys.
Running back Marion Barber III wore No. 24 for the Dallas Cowboys from 2005 to 2010.
Roger Staubach wore #12 during his career with the Cowboys.