Extercatte showed great promise in his first two years in the PDC, winning the Open Oust Nederland in 2004, followed by the 2005 Open Holland. He made his televised debut when he played at the 2006 PDC World Darts Championship, defeating Darren Webster in the first round but lost in the second round to Gary Welding. Extercatte got through to the 2008 PDC World Darts Championship. Starting at the Preliminary Round, he defeated Alan Bolton of New Zealand 5-0 before beating Colin Osborne in the first round. He lost in the second round to Barrie Bates.