Mark Allen (snooker player)

Mark Allen is a Northern Irish professional snooker player from Antrim. He won the World Amateur Championship in 2004, turned professional the following year, and took only three seasons to reach the top 16. In his fourth professional season, he beat the defending champion Ronnie O’Sullivan en route to the semi-finals of the 2009 World Championship, where he lost to the eventual winner, John Higgins.