King's switch from the BDO to rival organization the Professional Darts Corporation (PDC) created much debate and controversy. During the 2007 BDO World Darts Championship there was much speculation that King and three fellow BDO players (Michael van Gerwen, Jelle Klaasen and Vincent van der Voort) would be switching to the PDC after the World Championships. King was angry that rumours had surfaced and even threatened to quit the tournament as the speculation heightened even stating, "I'm really not happy with the treatment I've had today, not just from one person but from a lot of people who I have known for many years". Despite claiming to BDO press officer Robert Holmes that he would "rather pack up darts than play for the PDC" King announced his switch to the PDC on 6 February 2007 in a bid to "further his career". Having reached the semi-final of the 2007 BDO World Championships losing to eventual champion Martin Adams, King had signed a contract confirming he would play at the 2008 tournament due to a clause in all contracts of BDO players stating that if they reach the semi-finals of the World Championship they are obliged to return the following year, with champions committing themselves to three years. King's switch meant that the BDO threatened legal action against King.