'There's no comparison in European sport to NFL transition', says Christian Wade
The odds were stacked against Louis Rees-Zammit as he aimed to establish himself in the NFL.
And, after spending 18 months chasing his NFL dream, the Welsh star decided last week that the time was right to return to rugby.
The 24-year-old is the latest 'crossover athlete' unable to make the transition from another sport, most of them from rugby.
Australia's Jordan Mailata managed to do so, becoming a Super Bowl winner this year, but why is it so hard for others to break into the NFL?
