Alexander (coach's decision) is inactive for Sunday's game against Chicago.
Detroit is signing Alexander from Denver's practice squad, Adam Schefter of ESPN reports.
Alexander signed with the Broncos' practice squad Wednesday, Parker Gabriel of The Denver Post reports.
The Vikings worked out Alexander (Achilles) on Tuesday, Tom Pelissero of NFL Network reports.
Pittsburgh placed Alexander (Achilles) on its injured reserve list Tuesday, Teresa Varley of the Steelers' official site reports.
Alexander sustained a season-ending Achilles injury in Sunday's 23-19 win over the Packers, Adam Schefter of ESPN reports.
Alexander (leg) has been ruled out for the rest of Sunday's game against the Packers, Mike DeFabo of The Athletic reports.
Alexander (leg) is questionable to return to Sunday's game against the Packers, Ray Fittipaldo of the Pittsburgh Post-Gazette reports.
Alexander recorded two tackles and an interception in Thursday's 20-16 win over the Titans.
Alexander had 10 tackles (six solo), including one tackle for loss, in Sunday's 40-17 win over the Dolphins.