Starting out at Swinton Lions in 1999, Nanyn made his debut at the age of 16. Despite his age, Nanyn was a standout performer for the Lions during the more turbulent years of 1999-2003. Thus defining himself as both a try scorer and prolific goal kicker. Nanyn signed for the Widnes Vikings in 2006. In his first season at the club, he scored 388 points, breaking the record for most points scored in a single season, an accolade he took from Jonathan Davies. He beat his own record a year later, scoring 434 points in 2007.
