re: I've been living under a rock. What is opt out mean? And why?

I wish there was a rule for every player that can't be touched by NFL until they are a 3rd year player no matter what and not offer money in turn to make them decide to opt out...I know is it a profession worth a lot of money but dam , if it's meant to be, it will be there when time comes....sad that u cant even relax and still be a kid in college and enjoy football at its purest anymore...facts