If it seems like every week one of the Panthers is facing a team they previously spent their entire careers with, it’s because that’s true. At least for the last three weeks.Safety Roman Harper, who played with the Saints for eight seasons, went first. Then it was receiver Jason Avant, who returned to Philadelphia after eight years with the Eagles.This week, it’s safety Thomas DeCoud’s turn.“Playing your old team, a place where you spent a lot of time, it’s always going to be circled on your calendar with red and yellow highlighter,” DeCoud said.