I read through this and I don't know but it seems to be missing the point. I think what Adrian Foster was complaining about is that he was forced to participate in some Christian church activities just because he was on the football team. If this was a private Christian school, that would be fine but what about the Jews, Hindus, or Muslims on the team? What if the coach was Muslim and forced the team to do some Muslim activities? The narrative would be different.
The point isn't about who follows what religion, the point is SEPARATION of religion from football. Players can follow whatever religion they want on their own time as can the coaches. Players can choose to go to church together or pray or whatever they want. I don't think the coach should impose his religion on the players though, whether the coach is catholic, Muslim, or whatever. If he wants to do team building, find a secular way to do it.