Oh dear, perhaps in future you should do your research. I suggest a quick google search.
Ever heard of Dally Messenger?
There are many more big name examples on the following page.
Fair dinkum. Give yourself an upper cut.
http://en.wikipedia.org/wiki/List_of_pl ... ugby_union
There are many players who have converted from one football code to another or even changed from other sports at a professional or representational level.
In some countries, such as the United Kingdom or Australia where multiple codes are popular and the practice of switching codes is relatively common they are known simply as a code convert.[1]
In Australia star code converts can have a substantial impact on the football codes. For instance, Dally Messenger's defection from rugby union to rugby league was considered a pivotal moment in the establishment of the latter code over other codes in Australia.
Australian rules football to rugby league
Early in the history of the two codes in Australia, players would interchange the codes and even had discussions of merging them into a single game.[10] Rugby league has since evolved to specialise in physicality and body type making it more difficult for successful conversion between the two, although it does sometimes happen at junior level and in areas where both codes are played. League great Darren Lockyer played Aussie Rules at a junior level in Queensland,[11] as did Marcus Bai in Papua New Guinea. Players of both codes at Junior levels have included Peter Sterling[citation needed] (League) and Paul Kelly (AFL). Greg Brentnall played Australian Football in Riverina in the 1960s before turning down an offer to play in the VFL/AFL and switching to rugby league taking up a contract with the Canterbury-Bankstown Bulldogs in 1972.
Australian rules football to rugby union
As in rugby league and Australian rules, early in the history of the two codes in Australia the two codes were interchangeable[citation needed]. There is a much greater divide today. Jason Akermanis was the first professional Australian football player to suggest a switch to rugby union.[7] Nevertheless, there are still some positions and roles that have commonalities (particularly those that involve kicking and catching such as the backs and second row in rugby union; half forwards and rucks in Australian Rules).[8] Also at amateur level, conversion is quite common, as in the case of many start-up Australian Rules clubs in countries such as France[9] and developing Aussie Rules countries such as New Zealand and Samoa where there are dual-internationals at junior level.
