Buuxi weedha soo socota: Fenwick wuxuu ciyaaray rugby isagoo arday ah oo u ciyaaray Caerphilly Grammar Technical School, ka dibna wuxuu ku biiray Taffs Well RFC. Sanadkii 1971-kii wuxuu u wareegay Beddau halkaas oo uu ka ciyaaray 51 kulan ka hor inta uusan u dhaqaaqin kooxda heerka koowaad ee Bridgend. Intii uu joogay Bridgend, Fenwick wuxuu kasbaday dhammaan 30-kii kulan ee caalamiga ah ee Wales, isagoo markii ugu horreysay ka hor yimid Faransiiska 1975, kaas oo uu ku dhaliyay isku day shan daqiiqo ka dib, wuxuuna ciyaarta ku dhammaystiray 9 dhibcood. Wuxuu xubin ka ahaa
1977 British Lions ayaa u safray New Zealand, halkaas oo uu ka ciyaaray afarta tijaabo. Waxa uu sidoo kale kabtan u ahaa Wales ciyaartii Centenary ee ka dhanka ahayd All Blacks sanadkii 1980. Wuxuu sidoo kale u ciyaaray World XV 9kii Ogosto 1980 oo ka dhan ah Buenos Aires, oo laga badiyay 36-22.