Oakland Raiders defensive lineman Richard Seymour is a glass half full kind of guy. He has to be after the Raiders have given up 22, 35, 31 and 37 in their past four games. Oakland 1-3 start isn’t only on the defense, but Seymour still believes they can be a good unit. Seymour spoke to Vic Tafur of the San Francisco Chronicle about the defense’s troubles. "We're so close on so many plays. It's fixable," he said. "We're headed in the right direction." "Teams are getting the ball out quick to try to tire" the defensive line, Seymour said. "We've got to get our hands up and challenge them on the edges." "I said all off-season, all camp, I believed in this scheme," defensive back Michael Huff said. "So, it doesn't really have anything to do with the scheme of things. It's just us players aren't really executing when we need to. The playmakers aren't making plays when we have to. For us, the players have to step up and make more plays."