Middle linebacker Nick Roach was on the field Wednesday for the first time since leaving the Green Bay game with a concussion on Aug. 22



Although cornerback Chimdi Chekwa remains out with a knee injury _ he was working with the athletic training staff _ the Raiders look as if they’ll go in to the regular season opener Sunday against the New York Jets in good health.

Coach Dennis Allen and coordinators Greg Olson and Jason Tarver will address the media following practice.