Hamilton started playing darts at the age of 14 with his father Jim and brother Darren. By the age of 18, Hamilton was playing county level darts for Cheshire. However, he did not feel confident enough to pursue a career at the higher level and stopped playing competitive darts for 20 years.

Hamilton made his television debut at the 2004 UK Open but was eliminated in the first round 5–2 by Eddie Lovely. His first semi-final on the PDC Pro Tour came in just his fourth event when he was beaten 3–2 by Mark Dudbridge in a Scottish Players Championship.

Hamilton qualified for the PDC World Championship for the first time in 2005 and made an immediate impact by reaching the quarter-final stage. Hamilton defeated Mark Thomson and Mick Manning 3–0 in the early rounds and beat former BDO World Champion Steve Beaton 4–2 to reach the last 16. After beating Josephus Schenk 4–1 in the fourth round, Hamilton eventually lost 5–1 to Bob Anderson. He overcame Wes Newton and Mark Robinson to reach the last 32 of the UK Open, but was beaten 11–4 by Mark Walsh. He also qualified for the Las Vegas Desert Classic for the first time where Darin Young defeated him 2–0 in the opening round.

...
Wikipedia