Cowboys Zack Martin Injures Knee

Dallas Cowboys offensive lineman Zack Martin is going to have an MRI on his injured knee Sunday.  The Pro Bowl guard suffered a hyperextended left knee in the second quarter of the preseason game against the Bengals on Saturday.  Martin has not missed a game in his first four NFL seasons and signed a six-year extension in the offseason.  Coach Jason Garrett said the medical staff is optimistic but will know more after further testing.

Photo; Getty Images


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