I know in high school football is varies from district to district. If the district wants to pay ems to come sit and be there if something happens they can. Some (with money) opt to do this. I did attend one high school football game last year where a young man had a really bad broken leg and it must have taken ems over 20 minutes to finally get there. All the while the poor kid lay on the ground screaming in pain. Not sure how schsl playoffs pay for ems is done though.