"It's not easy to go to another team and get accepted, no matter how much success you've had and how many years you've played," Montana told me last Friday during an on-camera interview that will be featured on NFL Network's GameDay Morning this coming Sunday, before his two former teams face off in Super Bowl LIV in Miami. "They still want to see you come in and be the same player and be that loyal to them as you were to the other team you just left. So, it's not easy (for) guys looking at that change, especially at the quarterback position."