The Cowboys welcomed the return of starting right tackle Terence Steele to the first team on Monday, but lost left tackle Tyler Guyton toward the back end of practice. The team also didn’t have backup guard Rob Jones, who is out two to three months with a broken bone in his neck.

Cowboys left tackle Tyler Guyton has suffered a knee injury in practice. Monday's incident was the second injury on Dallas’ offensive line in as many days.

It was a rough two-day stretch for the Dallas Cowboys on the offensive line. After Robert Jones broke a bone in his neck during Sunday's training camp practice, Tyler Guyton left the field Monday with a knee injury.