Scanlon secured a development contract with Munster for the 2011-12. He made his debut for Munster against Connacht in a RaboDirect Pro12 match on 26 December 2011. He scored his first try for Munster during the game. He signed a one-year contract extension with Munster in March 2012. He started at fullback for Munster A in their 31-12 2011–12 British and Irish Cup Final victory against Cross Keys on 27 April 2012.