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TROY AIKMAN Dallas Cowboys quarterback After leading the
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TROY AIKMAN
Dallas Cowboys quarterback

After leading the Dallas Cowboys to three Super Bowl victories in the mid-90s, Aikman hung up his cleats in 2002 after suffering 10 concussions in 12 NFL seasons.(Credit: AP File)

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Famous sports concussions

A look at some famous athletes who have had their careers shortened or otherwise impacted by concussions.