Purdue coach Ryan Walters says he knows ‘for a fact’ Michigan sign stealer was at ‘a number of our games’ | CBS Sports Headlines Purdue coach Ryan Walters says he knows ‘for a fact’ Michigan sign stealer was at ‘a number of our games’ The Boilermakers are taking additional precautions … Continue reading Purdue coach Ryan Walters says he knows ‘for a fact’ Michigan sign stealer was at ‘a number of our games’