Pittsburgh is set to release Peterson, Adam Schefter of ESPN reports.
Peterson recorded two tackles (one solo) and an interception in Saturday's 34-11 win over Cincinnati.
The Steelers and Peterson agreed to terms on a two-year contract Monday, ESPN's Adam Schefter reports.
Peterson compiled a career-high 66 tackles (56 solo) and 15 pass breakups -- including five interceptions -- while playing all 17 regular-season games for the Vikings in 2022.
Peterson had six total tackles in Sunday's win over Green Bay.
The Vikings and Peterson agreed to a one-year contract Wednesday, Chris Tomasson of the St. Paul Pioneer Press reports.
The Vikings activated Peterson (undisclosed) from the reserve/COVID-19 list Tuesday.
Peterson (illness) was placed on the reserve/COVID-19 list Monday, Ben Goessling of the Minneapolis Star Tribune reports.
Peterson (hamstring) was activated from injured reserve by the Vikings on Saturday.