Why is the average career length of an NFL player only 3 years? - Quora
The average length of NFL careers decreasing about two years - Sports Illustrated
What is the average NFL player's career length and salary? - Quora
What is the average NFL player's career length and salary? - Quora
Average length of an NFL career, by position : r/nfl
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What is the average NFL player's career length and salary? - Quora
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NFL Average Career Length
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