Rubuta ci gaba don wannan sakin layi - Bayan samar da gajeren lokaci a cikin ƙungiyar yanki na Scarlets yayin da Mark Jones ya tafi yana taimakawa ƙungiyar Wales ta ƙasa a lokacin gasar cin kofin Six Nations ta 2013
, Holley ya shiga Bristol Rugby a matsayin mai horar da 'yan wasa na farko a gabanin kakar 2013-14. Ya sabunta kwantiraginsa tare da Bristol a watan Afrilun 2015. Bristol ya sami ci gaba zuwa Premier Ingila a karkashin jagorancin Holley a karshen kakar 2015/16 inda ya doke Doncaster a wasan karshe na uku a cikin shekaru masu yawa. A ranar 24 ga Yuni 2016, shi da Bristol Rugby sun rabu da juna ta hanyar yarjejeniya.