Cowboys LB Sean Lee Out 4-6 Weeks With Hamstring Injury
Dallas Cowboys lose Sean Lee for six weeks to add to Leighton Vander Esch injury, NFL News
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Former Penn State linebacker Sean Lee retires from NFL
Dallas Cowboys LB Sean Lee Retires From the NFL – NBC 5 Dallas-Fort Worth
Sources: Cowboys brace to play next three games without LB Sean Lee
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Sean Lee of Dallas Cowboys injured during OTAs - ESPN
Report: Sean Lee expected to miss 4-6 weeks with hamstring injury - Blogging The Boys
NFL on FOX - Dallas Cowboys LB Sean Lee says that he will be back for the team's next game vs. the New York Giants. (via The Dallas Morning News)