Cowboys LB Sean Lee injured

Linebacker collided with rookie lineman Zack Martin Aaron Wilson

Print This May 27, 2014, 01:54 PM EST

Dallas Cowboys linebacker Sean Lee was helped off the field, according to Dallas reporters.

Lee was knocked down by rookie first-round offensive lineman Zack Martin.

Lee has a history of injuries and has yet to play a full season.

Lee is one of the best linebackers in the NFL when he's healthy.

He was signed to a seven-year, $42.6 million contract last year.

Follow me on Twitter: @RavensInsider

Aaron Wilson covers the Ravens for The Baltimore Sun

NFP's Introduction to Scouting Class is now registering for our Winter sessions! Save $200 if you register before December 20th! REGISTER NOW!

NFP Inside Content. All Season.