At first glance, the site seems pretty legitimate. They use registered trademarks and make it a point to state that their products are licensed by the league. He guarantees a 14 day return policy.
The first thing I noticed that made me suspicious was the lack of capitalization. Bad grammar, spelling, and punctuation is frequently a sign of a fraudelent site or eBay listing.
Second thing that caught my eye is the photos he's using are straight from nfl.com. As a buyer, I'd rather see photos of his stock. Anybody can copy photos from nfl.com.
What confirmed that the site is fraudelent was this:
You can see the letters have yellow around them. The Redskins have never had yellow around the letters on their jerseys.
BUSTED.