As first reported by FOXSports.com on Wednesday morning, the Minnesota Vikings were expected to sign free-agent CB Frank Walker to a one-year deal. The veteran defensive back wound up signing his contract and was able to practice with the team.

To make room for Walker on the 53-man roster, the Vikings placed starting CB Cedric Griffin (knee) on injured reserve.

In addition, the Vikings released TE John Nalbone from the practice squad and signed CB Marcus Sherels to the practice squad.

- Adam Caplan