It is not just Australians who are getting behind Jarryd Hayne, with the former Parramatta star's No.38 San Francisco 49ers jersey currently the most popular selling shirt on the NFL's online store.

There has been considerable hype for Hayne since he touched down in the US attempting to make the transition from rugby league to the NFL and since the announcement on Sunday he had secured a spot on the 49ers final 53-man roster, there has been a startling increase in the number of jerseys sold.

The 'Men's San Francisco 49ers Jarryd Hayne Nike Scarlet Game Jersey' is the highest-selling shirt out of hundreds of other options, but another Hayne jersey - his 'Pro Line Mens San Francisco 49ers Jarryd Hayne Team Color Jersey' - comes in at second on the list.