Williams was signed off the Rams' practice squad to the Lions' active roster Saturday.
The Rams released Williams on Tuesday.
Williams has agreed to sign a contract with the Vikings, Ben Goessling of the Minneapolis Star Tribune reports.
Williams was restored to the Rams' practice squad Wednesday.
Williams was placed on the Rams' practice squad COVID-19 list Tuesday.
Williams was signed to the Rams' practice squad Tuesday, Jourdan Rodrigue of The Athletic reports.
Williams was waived by the Vikings on Thursday after a failed physical, Craig Peters of the Vikings' official site reports.