Cowboys' All-Pro OL misses second straight day of practice with injury

Cowboys guard Zack Martin missed practice on Thursday, marking the second straight DNP day for the nine-time Pro Bowler and perhaps putting his status for this Sunday's matchup with the Eagles in question.

According to ESPN's Todd Archer, Martin was not working with the team during the portion of practice that was open to media members.

The 33-year-old has frequently been given Wednesdays off as a veteran's rest day, but there looks to be more going on with the right guard this week. Earlier in the day, when asked about Martin's overall performance this season, Cowboys head coach Mike McCarthy said that the seven-time first-team All-Pro "has had a couple things he's been dealing with."

A shoulder injury had Martin limited for portions of last week . He was listed as questionable for the Week 9 game in Atlanta, but went on to play every offensive snap in the 27-21 loss. So far this season, the Notre Dame product- in the final year of his contract- has played 519 out of 553 offensive snaps, fourth-most on the team.

It's been a down year, at least by Martin's usual measure. PFF currently has him ranked 41st among the NFL's guards with an overall grade of 64.6. His 64.2 pass-block grade puts him in 38th place, while his run-block grade of 60.2 drops him all the way out of the top 50.

Offensive line play across the board has been spotty this year in Dallas, sharing at least some of the blame for a woeful 82 rushing yards-per-game average that has the team ranked next to last and allowing nearly three sacks per game.