Tillery (lower leg) was absent from Minnesota's injury report Wednesday ahead of Sunday's Week 1 game against the Giants.
Tillery left Saturday's practice session on a cart due to a lower right leg injury, Mark Craig of the Minneapolis Star Tribune reports.
Tillery agreed to a one-year contract worth up to $3.75 million with the Vikings on Thursday, Tom Pelissero of NFL Network reports.
Tillery is set to be released by the Raiders on Wednesday, Vincent Bonsignore of the Las Vegas Review-Journal reports.
Tillery re-signed with the Raiders on Friday.
Tillery (back) was claimed off waivers from the Chargers by the Raiders on Monday, Ian Rapoport of NFL Network reports.
The Chargers waived Tillery on Thursday.
Tillery (back) has been ruled out for Sunday's matchup against the Falcons.
The Chargers declined the fifth-year option on Tillery's rookie contract Monday, Ian Rapoport of NFL Network reports.
Tillery landed on the reserve-COVID-19 list because he tested positive for the virus, Shelley Smith of ESPN.com reports.