Murnan qualified for the 2011 UK Open where he reached the last 32. He defeated Mark Dudbridge 9–8 in a close affair, before losing to the 1995 Embassy World Darts Champion Richie Burnett 9–6.

In March 2014, he reached the last 32 of the UK Open again, this time being beaten 9–3 by Raymond van Barneveld. Later in the month he progressed to the last 16 of a PDC event for the first time as he beat the likes of Dean Winstanley and Dave Chisnall at the first Players Championship, before losing 6–4 to Andy Hamilton. He won through to the same stage of the third event where he was defeated 6–1 by Gary Anderson. Murnan also qualified for the German Darts Masters, but was eliminated 6–2 by Andy Smith in the first round.

In February 2015 at the German Darts Championship, Murnan beat Michael Barnard 6–5, Ian White 6–4 (averaged 99.72) and Brendan Dolan 6–4 to play in his first PDC quarter-final. He fell 4–0 down to world number one Michael van Gerwen, before closing to 4–3 with a 12 dart leg, but went on to lose 6–4.

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Wikipedia