Kammala jumla mai zuwa: Henderson ya kai gasar cin kofin duniya ta PDC ta farko a
2012, amma an doke shi da zakaran duniya sau uku, John Part, 0<unk>3. Ya sami nasarar lashe kafafu 2 ne kawai a lokacin wasan, tare da Bayanin bayan haka cewa "Yahaya ya yi gwagwarmaya kuma ba shi da kansa". Sakamakonsa mafi kyau a 2012 Pro Tour shine ya kai wasan kusa da na karshe na gasar zakarun Turai na 16th, inda ya rasa Nick Fullwell 2<unk>6. An doke Henderson a wasan karshe na 16 na Kwarewa don Gasar Cin Kofin Duniya ta 2013. Ya kasance mai lamba 39 a duniya bayan Gasar Cin Kofin Duniya.