Left tackle Joe Staley was on the field for the start of today's practice, but he was wearing a black "no contact" jersey and has not been cleared for practice following his concussion Sunday.
Staley saw an independent neurologist Monday and went through more on-field tests today. Per league rules, he must pass a battery of tests before being cleared to practice and play.
"We're going through the process," Staley said before practice. "We're going through a few different stages and I met with the neurologist yesterday. Everything went well there. And today, I have a workout, go on the field and see how everything goes with that."
Staley suffered the concussion midway through the third quarter Sunday when he collided with Giants safety Stevie Brown after an interception. "It was one of those deals where I was tracking the ball carrier and the guy got a good shot on me," Staley said. "It came out of the blue."
Staley said the concussion he suffered last year in Arizona was worse than the current one. He returned the lineup the following week last season. However, he has a shorter span to recover with the current injury.
Receiver Mario Manningham (shoulder) also was in a black, no-contact jersey. Last year, as a member of the Giants, Manningham had five catches for 56 yards against the Seahawks. He said Seattle, as is their custom, played a lot of press coverage in that game.
"I like when teams press me," Manningham said. "I feel like it gives you the advantage."
-- Matt Barrows