Cowboys All-Pro OG Martin returns to practice

Zack Martin returned to practice for the first time in 10 days on Tuesday and plans to ramp up activity throughout the week with the Dallas Cowboys to be ready for the start of the regular season.

Martin was diagnosed with a bone bruise and hyperextended knee, but the Cowboys expect him to be ready for the season opener on Sept. 9.

Martin remained on the turf for several minutes after a collision in the second quarter with Cincinnati Bengals cornerback Dre Kirkpatrick on Aug. 18. Further evaluation of his left knee revealed no major damage.

Martin, 27, signed an $84 million contract extension in June. Since being drafted in the first round out of Notre Dame, he has started all 64 games in his four-year career with the Cowboys.

None of the starting offensive players will play in Thursday's preseason finale against the Houston Texans.

The makeup of the front five for Week 1 against the Carolina Panthers is not set in stone, with center Travis Frederick replaced by Joe Looney and Tyron Smith (hamstring) not practicing Tuesday.

Frederick was diagnosed with Guillain-Barre, an autoimmune disease, and is out indefinitely.

(This story has not been edited by Devdiscourse staff and is auto-generated from a syndicated feed.)