The difference between retail on-field and game-worn MLS jerseys is zero. I've held them side-by-side and tried to find a difference and I can't. Everything is the same. Tagging, crests, sponsors, lettering. Nothing is stitched; it's all either heat-pressed rubber (crests and MLS logos) or vinyl (lettering). The older versions like Nike did have different aspects that you couldn't find in stores but the Adidas stuff is really identical. I've always had a small fear in my stomach that all the "worn" jerseys I've ever bought are just retail stuff and that I got hosed big-time. In fact, here's a funny story. I brought my soccer stuff to the last MeiGray Expo and I didn't realize until someone commented on one of my Red Bulls ones that I'd brought my RETAIL version and not the actual worn one! The only difference was the size.