Add linebacker Sean Lee to the list of Dallas Cowboys dealing with a hamstring injury.
Lee left Thursday’s practice with hamstring tightness. The extent of the injury is unknown, coach Jason Garrett said.
Lee joins a long list that includes wide receiver Ryan Switzer, defensive lineman Cedric Thornton and cornerbacks Jourdan Lewis, Anthony Brown and Marquez White who have battled hamstring issues in training camp.
Lee, 31, has dealt with several injuries throughout his career, but had his first fully healthy season a year ago. Lee led the team with 174 tackles with 12 tackles for loss and four quarterback pressures.
Lee played in only 15 games, as he sat out the regular-season finale with no playoff implication at stake.
With Lee out, linebacker Jaylon Smith worked with the first team. Garrett said Lee’s injury would not affect whether the team plays Smith in Saturday’s preseason game against the Rams.
Left tackle Tyron Smith was sidelined another practice as well. Smith is dealing with a stiff back.
“I’m good,” Smith said, saying the team was holding him out just out of precaution.
Other injured players include wide receiver Brice Butler (strained foot), defensive lineman Tyrone Crawford (sprained ankle) and offensive lineman Joe Looney (toe).