If I were a judge, I’d just dismiss the case on the grounds of assumption of risk.
If you step out on the football field, you are liable to get hit/tackled. You assumed that risk by going out onto the field. Don’t like it? Keep your ass off the field.
If you’re so inclined google Mike “mad dog” Curtis - middle linebacker for the old Baltimore Colts.
See what he did to a fan who ran on the field between plays and tried to steal the ball.
It wasn’t even that big of a hit. McVay did little more than stand up and to an intercept and the guy bounced off.