First off, only take that whey stuff directly after your workout. Its so fast digesting that your body can only efficiently absorb it postworkout. Take it any other time, and it'll just give you expensive shit.

For football, you should probably grab a tub of creatine and a good multivitamin. 1fast400.com (sp?) is a good place to get both.

I'm not sure if you're trying to put weight on or not, but if you are, focus on eating a shitload, not supplements. A lot of young kids make that mistake. Good luck.