Simpson joined the Lions via a trade late in the 2009 preseason and was banged up quite a bit during his year in Detroit. He spent the first part of training camp on the PUP list this year and just never seemed to be able to get healthy. With Louis Delmas and C.C. Brown entrenched as the starters at safety, Randy Phillips emerging this preseason and Spievey making the move from cornerback, Simpson became expendable.
The Lions are now down to 70 players on their roster, meaning 17 more moves are necessary before 6 p.m.