By Tzvi Machlin Cleveland Browns quarterback Baker Mayfield remains a man without a country as the team continues to excuse him from training while trying to find a trade partner. But there’s a small chance the Carolina Panthers may be looking to give him refuge. According to NFL insider Josina Anderson, the Panthers are doing “due diligence” on Mayfield. Per her sources, they’re looking into Mayfield as both a player and a person. That report is about the closest thing anyone has gotten to reporting on even a potential trade. The rumor mill has been limited to just a couple of teams since the…