Congrats taprock!!!
As for the football game... I'd let him go. He works very hard and deserves some fun time, it may motivate him to work harder at everything else just so he can make time to have fun. I do understand where you're coming from though, I have a high school freshman this year. Every kid needs a balance of social fun and sports and school. Hanging out with friends and showing school spirit is a very improtant part of the high school experience.
As for the football game... I'd let him go. He works very hard and deserves some fun time, it may motivate him to work harder at everything else just so he can make time to have fun. I do understand where you're coming from though, I have a high school freshman this year. Every kid needs a balance of social fun and sports and school. Hanging out with friends and showing school spirit is a very improtant part of the high school experience.