Pat Tillman uniform number should be retired by NFL, petition says
NFL icon Pat Tillman joined army after 9/11 and was killed in Afghanistan - Daily Star
Teams shouldn't retire jerseys if they don't intend to keep them retired - NBC Sports
Push to Retire Pat Tillman's Jersey Number Gains Momentum
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Petition to Retire Pat Tillman's Number 40 Permanently : r/Military
15 Pro Athletes Who Served in the Military - Men's Journal
In Memory of Pat Tillman - Sports Illustrated
Pat Tillman - Wikipedia
Where Men Win Glory: The Odyssey of Pat Tillman by Jon Krakauer
Petition to retire Pat Tillman's #40 jersey league-wide gains momentum
Detroit Lions draft pick 'content' with NFL career, Saginaw Hall of Fame induction
Petition calls for NFL to retire Pat Tillman's No. 40 jersey