Cowboys starting linebacker Sean Lee was injured Monday in the club's first padded practice and will miss the next few days of camp, head coach Jason Garrett says.
Lee tweaked his knee Monday, but Garrett said it was not considered to be serious or require surgery.
Joe Thomas filled in for Lee at linebacker Tuesday.
Lee is a 10-year veteran, but has never played a full 16 games. Last season he played in seven games for the Cowboys.
