Atkinson was claimed off waivers by the Raiders on Saturday, Michael Gehlken of the Las Vegas Review-Journal reports.
After being waived by the Browns earlier in the week, Atkinson will return to Oakland, where he started his career in 2014. Atkinson will have a tough hill to climb in terms of breaking camp with the team, but he was very close to landing on Oakland's 53-man roster last season. He'll likely have to be a standout special teamer in order to remain with the club.