Also, most photographs and other images that you find on the web are not in fact free for you to use, modify or incorporate into your own work, and then re-sell - as they are copyrighted and/or trademarked images, and protected as such.
If you have any follow-up questions, here are some additional resources that might help:
-nfl.com's terms and conditions page.
-a google search on unlicensed trademarked NFL logos.
-a google search on fair use of copyrighted photographs.
This is merely a little public service annoucement, and in no means meant as legal advice. You should contact a lawyer for that.
