Cross-code moves are all the rage in football. The great English league forward Sam Burgess is the latest to switch careers with a belated bid to make rugby's World Cup next year. The gifted Aussie league back Jarryd Hayne is chasing an NFL contract and Sonny Bill Williams is back in the All Blacks. A smattering of sports stars have broken all sorts of amazing barriers through the ages.
Madonna Harris (New Zealand)
Sonny Bill has some catching up to do here. In 1988, Harris competed at the Winter Olympics in cross-country skiing and Summer Olympics in road cycling. Harris won a 1990 Commonwealth Games gold medal in track cycling, and she represented New Zealand in athletics and basketball in the 1970s. Better get the skis out Sonny.
Deion Sanders (USA)
Okay, his light shone in "only" two pro sports, but how. Neon Deion was a brilliant professional footballer and outstanding baseballer, who won Super Bowls with two clubs and played in a world series, the only man to have done so. In 1989 he hit a major league home run and scored a touchdown in the same week.
C. B. Fry (England)
A truly remarkable Englishman who emerged in the late 1800s. Captained England at cricket, played international football, trialled for England at rugby, and equalled the world long jump record ... among many other things that included an FA Cup final appearance for Southampton and 94 first-class centuries. He even wrote poetry in Latin and Greek. Fry also suffered bouts of mental illness.
George Smith (New Zealand)
The Auckland-born sporting genius played rugby and league for New Zealand in the early 1900s, was a champion jockey who won a New Zealand Cup and starred on the athletics track winning sprint and hurdles titles in New Zealand and Britain (he held an unofficial world hurdling record). Played English club league into his 40s and is revered for his role with the pioneering All Golds.