Former Panthers safety Mike Mitchell has confirmed he has signed a free agent deal with the Steelers. The versatile and athletic safety made draft lore by becoming a surprise second round pick of the Raiders in 2009. He's shown in five years why he was worth it. Free agent safety Mike Mitchell has announced via Twitter he has signed a contract with the Pittsburgh Steelers. Chicago Tribune reporter Brad Biggs is reporting Tuesday the Steelers and free agent safety Mike Mitchell will come to terms on a free agent deal. Mitchell, a second round pick of the Oakland Raiders in 2009, one of the more eyebrow-raising picks in recent memory. It has become a favorite draft memory story, as analysts covering the draft in 2009 appeared to not have any idea who he was. There was no film on him after his senior year at Ohio University.