The minute some player gets very sick, the lawsuits start flying. Anybody whose played college football or any sport knows “voluntary” means mandatory if you want to stay out of the dog house. Rules mean it’s your fault if you get caught nipping around the edges. They are always loookjng for some advantage. It’s like Harbaugh’s “voluntary” springbreak practices in Florida, if I recall correctly. Or the in Maryland that killed a player punishing him for heat exhaustion in voluntary workouts.