Mays has signed with the Lions, NFL.com's Ian Rapoport reports. Mays, a former second-round pick who has started 10 games in five seasons, was released by the Vikings last week. He's one of the NFL's better athletes when it comes to measurables, but he'll likely just compete for a depth role on the Lions. Glover Quin and James Ihedigbo are expected to start at safety, with Isa Abdul-Quddus the likely top backup.