The Raiders have tweaked their 53-man roster by claiming three players on waivers, and in turn cutting loose three players who thought they had made the team.
One of them likely presumed he was a lock to stick around.
In turn, the Raiders released cornerback Chimdi Chekwa, a fourth-round pick in 2011 who appeared in four games with one start. Also waived was cornerback Bryan McCann. The Raiders likewise waived/injured defensive tackle Jamie Cumbie.
Adams has 22 regular-season appearances. He was cut Friday by the Seahawks. Clayton, a fourth-round pick in 2010, appeared in 21 games with one start in two season. Smith appeared in four games, with three starts, for the Redskins as an undrafted rookie in 2011.