And that is not even taking into account other glaring needs such as running back, wide receiver, and defensive tackle.Fortunately, at least according to a recent three-round NFL mock draft, the Cowboys will fill three of those holes,

Two people with knowledge of the decision say Zack Martin is retiring after a decorated career that included seven All-Pro seasons at right guard with the Dallas Cowboys.

Over the last two seasons, Martin had problems with both ankles. The years of blocking defenders from getting to quarterbacks Tony Romo, Dak Prescott and Cooper Rush took a toll on his body. The blocks to open holes for running backs Ezekiel Elliott, Tony Pollard and Rico Dowdle took a toll as well.