Since your site is named for College football, I would stick to that one niche at this point in time. There certainly are tons of products that can be marketed in that area. Since your site title is college related, that is what people will look for in a search. As you build out your site you could eventually write separate posts about pro football merchandise...product reviews and links to where items can be purchased, etc. good luck and I hope this helps.

that's great advice, thanks. I can always count on WA friends for help.