Throwing a 21-year old rookie into a crucial World Cup match against one of the host nations on the other side of the world might seem like a risk to some. But it’s exactly the type of challenge Sean McMahon thrives on. Replacing the suspended Michael Hooper for Sunday morning’s Pool A decider against Wales, McMahon has big shoes to fill, but he certainly won’t be overawed by the occasion according to his coach. “Sean doesn’t care much for those sort of things,” Melbourne Rebels coach Tony McGahan told Rugby News. “The great thing about Sean and what sets him apart from others is that he just keeps it simple. It’s rugby, it’s footy, it’s what he loves and it’s what he enjoys, he just loves to compete.” McMahon’s journey to the World Cup has been short, but tremendously impressive. He missed Schoolies after graduating from Nudgee College to join the Australian Sevens program, before being picked up by the Rebels a year later. “We didn’t have any expec