big way -- whether copying numbers, letters, colors or some combination -- the league's lawyers will come after you. It usually doesn't matter whether the league will win in court (though most of the time they will) because most small merchandisers can't afford to take them on. (Yes, we know that can be unfair to the fans.) That said, you can probably get by with #2, a blue shirt with an orange number 17, and with #3 (especially if the lettering for New York is not in the Knicks typestyle). As noted, avoiding getting hassled may have a lot to do with where you sell your stuff. As you can imagine, you're always more likely to get hassled if you set up a booth near a licensed merchandiser who will certainly report your sales.
Nicknames. The legal right to exploit a player's nickname may belong to that player, particularly as with Linsanity, where the nickname incorporates the player's surname. In that case, the player may be able to assert right of publicity claims or trademark claims. As the search results for Linsanity show (above), there are presently nine people vying for the Linsanity registration for products ranging from computer software to perfume (Bouquet de Gym Socks?). We think, except for this applicant, most applicants will likely have wasted their $345 application fees.