Cowboys' Sean Lee tears ACL in first day of OTA's

The Dallas Cowboys started their 3 weeks of OTA's Tuesday, which would typically be exciting news for a team. However, in the teams first organized activity workout, middle linebacker Sean Lee tore the ACL in his left knee.

Lee underwent an MRI today, and the results determined the ACL tear.

This is not the first time Lee has torn his ACL. Lee tore his ACL in college and had a partial tear in the 2009 season.

Lee has a history of missing games due to injuries. In 2012, Lee missed 10 games with a toe surgery. Then in 2013, Lee missed 5 games with hamstring and neck injuries.

The Cowboys are aware of the history Lee has with injuries, and even built an insurance in Lee's contract. For Lee to get the full $51 million in his six-year contract, he must play 80 percent of the downs each season.

On the play that Lee hurt his left knee, it appeared that Lee slipped while being blocked by rookie right guard Zack Martin on a screen pass.

Lee fell to the ground and stayed there until he was helped to the locker room by the Cowboys training staff.

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