The Lions have parted ways with a couple of notable veteran defensive backs.
Bartell, 31, has started 72 games since entering the NFL in 2005, notching 338 tackles and intercepting eight passes.
A third-round pick of the Lions in 2010, Spievey was a 26-game starter for Detroit in three seasons. He appeared in five games in 2012 but was placed on injured reserve in November after suffering a concussion. Moreover, he dealt with concussion symptoms in the 2012 offseason, too.