5. INNOKENTY ZYKOV
Rugby is a unique sport, but there are many disciplines usually produce efficient rugby players. One great example is Innokenty Zykov, the Russian ex-wrestler-turned-pro who has started more than 21 games for the Russian side since 2012. Zykov completed his crossover from wrestling at the whopping age of 31 after signing for Russian side Yenisey-STM Rugby Club.