49ers injury report: C Marcus Martin upgraded to limited

Earlier in the day, San Francisco 49ers offensive coordinator Greg Roman said he was “hopeful” that center Marcus Martin’s knee injury would not keep him from playing Sunday at Seattle.

Turns out Martin’s status was the only update in the Niners’ injury report as the rookie went from not participating on Wednesday to being limited on Thursday.

“He’s very engaged in his preparation, as always,” Roman said of Martin, “and we’ve just got to work with our medical staff on that and make the appropriate decision.”

If Martin cannot go, Joe Looney is likely to start at center, or Dillon Farrell.

And if Martin is out, that would mean the Niners would be starting a third center this year as Martin replaced Daniel Kilgore, who broke his leg at Denver on Oct. 19.

Martin, though, has a fan in Roman.

“I think Marcus, gosh, I don’t want to make this statement and I don’t want to jinx him either, not that I’m superstitious or anything,” Roman said, “but I don’t know if he’s had a mental error.”

Following is the 49ers’ injury report for Thursday:

Did not participate: LB NaVorro Bowman (knee), WR Stevie Johnson (knee), DE Justin Smith (back), S Raymond Vetrone (groin)

Limited participation: CB Tramaine Brock (hamstring), CB Chris Culliver (knee), RT Anthony Davis (concussion), DT Glenn Dorsey (forearm), LG Mike Iupati (elbow), C Marcus Martin (knee), DE Ray McDonald (finger)