Butler, 27, was released by the Colts less than a week ago. The former fourth round pick of the Cowboys has shown promise but he missed last year with a torn ACL while with the Saints. The pass rush specialist signed with the Cardinals in mid-September but his stay in Arizona was brief as he was released on October 1st. In his four seasons in Dallas (2009-2012), Butler totaled 11 sacks and 68 tackles.
Quarles, 22, appeared in two games for the Colts this season and registered a sack in their week three win against the Jaguars.