Sports

Cowboys LB Sean Lee likely out for 2014 after tearing knee ligament in 1st offseason practice

  • Dallas Cowboys linebacker Sean Lee is helped off the field by head athletic trainer Jim Maurer, left rear, and associate athletic trainer Britt Brown, right, after suffering an unknown left knee injury during an NFL football organized team activity, Tuesday, May 27, 2014, in Irving, Texas. (AP Photo/Tony Gutierrez)

    Dallas Cowboys linebacker Sean Lee is helped off the field by head athletic trainer Jim Maurer, left rear, and associate athletic trainer Britt Brown, right, after suffering an unknown left knee injury during an NFL football organized team activity, Tuesday, May 27, 2014, in Irving, Texas. (AP Photo/Tony Gutierrez)  (The Associated Press)

  • Dallas Cowboys' Sean Lee (50) is attended to by the athletic training staff after Lee suffered a injury during an NFL football organized team activity, Tuesday, May 27, 2014, in Irving, Texas. (AP Photo/Tony Gutierrez)

    Dallas Cowboys' Sean Lee (50) is attended to by the athletic training staff after Lee suffered a injury during an NFL football organized team activity, Tuesday, May 27, 2014, in Irving, Texas. (AP Photo/Tony Gutierrez)  (The Associated Press)

  • Dallas Cowboys linebacker Sean Lee is helped off the field by head athletic trainer Jim Maurer, left, and associate athletic trainer Britt Brown, right, after suffering an unknown left leg injury during an NFL football organized team activity, Tuesday, May 27, 2014, in Irving, Texas. (AP Photo/Tony Gutierrez)

    Dallas Cowboys linebacker Sean Lee is helped off the field by head athletic trainer Jim Maurer, left, and associate athletic trainer Britt Brown, right, after suffering an unknown left leg injury during an NFL football organized team activity, Tuesday, May 27, 2014, in Irving, Texas. (AP Photo/Tony Gutierrez)  (The Associated Press)

Dallas Cowboys linebacker Sean Lee could miss the 2014 season after tearing a ligament in his left knee in the first offseason practice.

The team hasn't announced results of an MRI but reported on its website Wednesday that Lee has been told he has a torn anterior cruciate ligament.

Lee went down during the 11-on-11 portion of Tuesday's practice. His left leg slid out from under him as rookie guard Zack Martin was closing in for a block, and Martin rolled over him.

The 27-year-old Lee hasn't played a full season in four years. The middle linebacker has missed 15 games over the past two years, including five of the final six games in 2013 with hamstring and neck injuries.

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