James moves shoes. Kyrie Irving’s signature line has sold well and likely will continue to do so while he’s in Brooklyn. Vintage Jordans still do a strong business. But NBA stars’ signature shoes by and large aren’t lighting up the market. “None of these guys with mega contracts are really earning enough in merchandise sales to offset their endorsement contracts,” Powell says. “I think the brands are very cautious now about who gets a big contract and who doesn’t.”