Because Washington Redskins Safety Sean Taylor was shot and killed and his number was 21. So, every team in the NFL wears that on the back of their helmets.
The Colts fumbled the opening kickoff of the second half and the Cowboys recovered. The Cowboys drove to the Colts 1 yard line when running back Duane Thomas fumbled the ball and the Colts recovered.
The cast of Super Bowl V - 1971 includes: Herb Adderley as Himself - Dallas Cowboys Left Cornerback George Andrie as Himself - Dallas Cowboys Right Defensive End Norm Bulaich as Himself - Baltimore Colts Fullback Mike Ditka as Himself - Dallas Cowboys Tight End Ron East as Himself - Dallas Cowboys Defensive Tackle Ron Gardin as Himself - Baltimore Colts Defensive Back - Punt Returner Walt Garrison as Himself - Dallas Cowboys Fullback Curt Gowdy as Himself - Announcer Cornell Green as Himself - Dallas Cowboys Left Safety Sam Havrilak as Himself - Baltimore Colts Running Back Ted Hendricks as Himself - Baltimore Colts Right Linebacker Roy Hilton as Himself - Baltimore Colts Right Defensive End Eddie Hinton as Himself - Baltimore Colts Wide Receiver Chuck Howley as Himself - Dallas Cowboys Right Linebacker Roy Jefferson as Himself - Baltimore Colts Wide Receiver Tom Landry as Himself - Dallas Cowboys Head Coach Bob Lilly as Himself - Dallas Cowboys Right Defensive Tackle Jerry Logan as Himself - Baltimore Colts Left Safety Tommy Loy as Himself - National Anthem Performer Dave Manders as Himself - Dallas Cowboys Center Don McCafferty as Himself - Baltimore Colts Head Coach Earl Morrall as Himself - Baltimore Colts Quarterback Ralph Neely as Himself - Dallas Cowboys Left Tackle John Niland as Himself - Dallas Cowboys Left Guard Pettis Norman as Himself - Dallas Cowboys Tight End Tom Nowatzke as Himself - Baltimore Colts Running Back Blaine Nye as Himself - Dallas Cowboys Right Guard Jimmy Orr as Himself - Baltimore Colts Wide Receiver Jethro Pugh as Himself - Dallas Cowboys Left Defensive Tackle Dan Reeves as Himself - Dallas Cowboys Running Back Mel Renfro as Himself - Dallas Cowboys Right Cornerback Glenn Ressler as Himself - Baltimore Colts Left Guard Kyle Rote as Himself - Announcer Lee Roy Jordan as Himself - Dallas Cowboys Middle Linebacker Reggie Rucker as Himself - Dallas Cowboys Wide Receiver Norm Schachter as Himself - Referee Bubba Smith as Himself - Baltimore Colts Left Defensive End Roger Staubach as Himself - Dallas Cowboys Quarterback Ernie Stautner as Himself - Dallas Cowboys Assistant Coach Charlie Stukes as Himself - Baltimore Colts Left Cornerback Duane Thomas as Himself - Dallas Cowboys Halfback Pat Toomay as Himself - Dallas Cowboys Defensive End Johnny Unitas as Himself - Baltimore Colts Quarterback Bob Vogel as Himself - Baltimore Colts Left Tackle Rick Volk as Himself - Baltimore Colts Free Safety Charlie Waters as Himself - Dallas Cowboys Right Safety Ron Widby as Himself - Dallas Cowboys Punter Rayfield Wright as Himself - Dallas Cowboys Right Tackle
Through Super Bowl XLII, the Cowboys have not lost back to back Super Bowls. They lost Super Bowl V to the Baltimore Colts and Super Bowls X and XIII to the Pittsburgh Steelers.
the player's number
The dark '91' sticker on the back of the Patriot helmets is a tribute to deceased teammate Marquise Hill.
Felix Jones, a running back, is number 28 on the Dallas Cowboys.
Jacob Lacey-Defensive Back
A bull dog is on the back of their helmets.
Defensive back Barry Church wears the number for the 2011 Dallas Cowboys.
The Patriots instead choose to wear the number 91 on the back of their helmets in remeberance of their fallen teammate Marquise Hill, who died over the summer of 2007 in a boating accident.
the death of Sean Taylor on the redskins every team in the NFL has his number on them
Mike Jenkins (CB) currently wears number 21 for the Dallas Cowboys.