I fail to see a moral issue. Peyton Manning got paid a lot of money, and odds are good he has insurance to cover if his career is ended early. The team didn't think it was worth it to keep him, and his contract allowed for that. If someone else wants to hire him, great, if not, well, he had a great ride, and made a shit ton of money for playing a game that almost always ends the way his career ended. It's not like he was making $50k a year, and now he's going to be destitute.