The Redskins announced the signing of cornerback Leigh Torrence, who spent two seasons with the team earlier in his career, and are close to a deal with another defensive back.
Madieu Williams is expected to sign a contract with the Redskins this week after also visiting the Atlanta Falcons and weighing offers from both teams.
Williams played sparingly for the 49ers last season but brings a veteran presence to a secondary with a depth chart unlikely to be sorted out until training camp.
Williams, 30, played collegiately at Maryland and was a second-round pick in 2004. He played four seasons with the Bengals and the next three with the Vikings, joining the 49ers as a free agent last August.
The Redskins likely present the best opportunity for Williams to earn a significant role. Washington didn't bring back LaRon Landry, who signed with the Jets, and released O.J. Atogwe, opening both starting safety spots.
The Vikings have added Williams, former Vikings cornerback Cedric Griffin and expect second-year free safety DeJon Gomes and veteran strong safety Reed Doughty to be in the mix.
Atogwe remains a free agent and could be re-signed but he has been plagued by injuries.