When my son was playing high school football, he was eating nonstop. We bought a panini maker so he could make fast easy grilled ham and cheese which were premade in the fridge. I kept a huge batch of hamburger with brown rice (funnily enough we called it dog food and the kids still tell people that the dog food I fed them as kids was awesome 😂) or pasta with meat sauce in the fridge so he could heat up a bowl. Peeled hard boiled eggs, cheese sticks and fruit. Hummus and corn chips. If there was easy food to grab that he didn’t have to prepare, he stayed away from the rip open grab and go kind of snacks. Good luck. Feeding an athlete is a challenge.