ALAMEDA -- There's a sense of urgency enveloping Silver and Blackdom now that the Napa portion of training camp is done and the Raiders have moved back to their home base at 1220 Harbor Bay Parkway.Things suddenly got real, and it had little to do with the 12 players shown their walking papers in the first round of cuts Monday morning."Its nice to get back home," said Raiders rookie coach Dennis Allen. "I got a chance to sleep in my own bed a couple nights, so that was good. It's good. I thought we had a good day of work today. It's good for us to get back in this environment, get our guys used to the locker room here, the practice facility, the weight room, all of that good stuff."It also marks another rite of passage for a rebuilding team."Every time you change the surroundings, people realize there's a little something different," Allen said. "Getting back here, it's kind of, we're getting close. I think everybody feels the sense that we're getting close to the opening day of the season."In Sunday night's conference call, Allen said 12th-year veteran defensive tackle Richard Seymour had arthritis in his knee. Monday afternoon, Allen referred to it as "tendinitis" while Seymour told reporters he had nothing of the sort, just the wear and tear of 11 NFL seasons on 32-year-old knees.Allen reiterated, though, that Seymour, who has not suited up since the Raiders' exhibition game at Arizona on Aug. 17, would be a gameday decision for the preseason finale Thursday in Seattle."It's just something we'll have to manage as we go throughout the season," Allen said of Seymour. "I've been through that process before with Darren Sharper in New Orleans, a guy that was a little bit long in the tooth so we had to take care of him. We had to manage him. It's not unlike any other situation I've dealt with."Allen also said he will wait until "the very last minute," or Friday, to make a decision on whether to place weakside linebacker Aaron Curry on the Physically Unable to Perform list for the regular season. Such a move would make him ineligible for the first six weeks of the season. Curry has yet to practice.Matt Leinart, who sat out Saturday's exhibition against Detroit with stitches in his right index finger, is expected to play against the SeahawksAlex Parsons will start at center against Seattle, with Stefen Wisniewski still out, and if Parsons goes down, the next man up is right guard Mike BrisielMarcel Reece has yet to get a touch in the preseason, but the multi-threat fullback said he is not worried about it.