According to Michael Rothstein, the Lions have placed OL Zac Kerin on the injured reserve and signed LB Thurston Armbrister from their practice squad in a corresponding roster move.
Kerin, 25, wound up signing on with the Vikings as an undrafted free agent out of Toledo back in May of 2014. He spent his first year on the Vikings’ practice squad before returning to the team on a future/reserve contract after the season.
Since then, Kerin has been on the team’s 53-man roster and played out the 2016 season on an exclusive rights contract.