You need a license from NFL Properties, LLC. Visit the link below and read its licensee qualification requirements. Bottom line: Very few companies qualify -- and no home-based businesses qualify.
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By obtaining a license from the owners of the trademark.
J Charles Ferrari Eng & Nishimura 213.622.2255 The statement above is general in nature and does not constitute legal advice, as not all the facts are known. You should retain an attorney to review all the facts specific to your case in order to receive advise specific to your case. The statement above does not create an attorney/client relationship. Answers on Avvo can only be general ones, as specific answers would require knowledge of all the facts. As such, they may or may not apply to the question.
To echo the other answers, the only way to legal sell the NFL team logos (which are almost certainly trademarked) would be to obtain a license to do so. Given the NFL's current licensing agreements with other apparel companies, such a license is not likely to be given. If you do so without the permission of the NFL you would be committing trademark infringement, and would face civil penalties.
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Well, you don't get to legally do what you want. That would be trademark infringement under 15 USC 1114 and false designation of origin under 15 USC 1125. This question is asked so frequently there is a legal guide, that I wrote, on it See http://www.avvo.com/legal-guides/ugc/can-i-use-nfl-logos-without-permission
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