Anthony Davis ruled out, Marcus Martin still up in the air for 49ers-Seahawks

Jim Harbaugh confirmed on Friday that the San Francisco 49ers will be without right tackle Anthony Davis this Sunday when they face the Seattle Seahawks. Davis was listed as limited in practice this week, wearing the blue non-contact jersey on Thursday, but clearly there is still an issue with the concussion.

That means Jonathan Martin will be playing right tackle once again. Although Martin has had some inconsistency this season, he is coming off a fairly decent performance against the Raiders. He gave up one quarterback hurry, but no hands on the quarterback. This came after giving up sacks in Week 12 and 13. Pro Football Focus graded him out with a +1.7 pass blocking grade. I have seen a lot of people talking about him being a turnstile at right tackle. While I would prefer he not be starting, I don't think he has been nearly as bad as people would otherwise think.

That being said, he faces a stiff test this weekend in Seattle. Martin gave up a sack and two hurries. He heads up north to Seattle in a game that will be a huge test for the entire line. The 49ers have had their struggles with crowd noise up in Seattle, as have many. Given all the turnover on the line, it will be interesting to see how they handle the crowd noise up at CenturyLink Field.

Speaking of which, center Marcus Martin is a question mark for Sunday. Jim Harbaugh said the staff was still deciding if he will be available. He sat out Wednesday's practice, and was limited on Thursday, in a practice that was not full speed anyway. If he is unable to go, the 49ers will roll out Joe Looney at center, with Dillon Farrell serving as his primary backup. Whether it's Martin or Looney starting, the center will have their hands full.