CNET: How Fanatics knows what jersey you want to buy before you do
Two years ago, an undrafted free agent named Jarryd Hayne unexpectedly made the cut and joined the San Francisco 49ers' lineup as a running back.
Plenty of players barely survive preseason and then slide into irrelevance, but that's not what happened with Hayne. The former rugby star for the Parramatta Eels in Australia quickly found a fan base in both the US and Australia, with thousands of people clamoring to buy a replica of his jersey…