Getty Detroit Lions edge rusher James Houston. When it comes to edge rushers, the Dallas Cowboys need a contingency plan in case the ongoing, messy contract negotiations between owner Jerry Jones and NFL All-Pro edge rusher Micah Parsons go sideways. They made another move to make sure the position group stays afloat in that case by signing former Detroit Lions and Cleveland Browns edge rusher James Houston on July 22 just days after bringing him in with several other players for a tryout/