What exactly is the purpose of having rights if you can't exercise them.
EXACTLY! Now, there are no restrictions on a person's right to free speech or expressing their views in the NFL that I am aware of. Yeah, they do have a morals clause which prevents you from doing things that are immoral or illegal, but free speech protest as far as I know doesn't have any restrictions. If anyone has a link to show where free speech is limited in the NFL, it would be appreciated.
However..................................
If you join the military, about 50 to 75 percent of your rights as an American citizen are suspended while you are in the military. If you wish to express your free speech, you have to check with your PAO (Public Affairs Officer) and tell them where you are going, why you are protesting, and how you will appear before they give you permission.
Incidentally...................you can't wear an official military uniform to a partisan rally to take part in the rally.