I believe that this is allowed but only if the other players are okay with being in a prayer, hence <em>freedom of religion</em> in the first amendment... but, if all players are not okay with the prayer because they have different religions, then the prayer is not allowed. Having a quarterback go to the announcer booth and lead the prayer there is also not allowed, because not everyone will have the same religion.
<span>a belief or theory that opinions and actions should be based on reason and knowledge rather than on religious belief or emotional response.</span>