ˌɔn fˈoːɹ ɑːktˈoʊbɚ tˈuː θˈaʊzənd fˈɪftiːn, kˈuːpɚ wʌzɐ mˈɛmbɚɹ ʌvðə kˈaʊbɔɪz ɡɹˈænd fˈaɪnəl wˈɪnɪŋ sˈaɪd, stˈɑːɹɾɪŋ æt sˈɛkənd ɹˈoʊ ɪnðə sˈaɪdz sˈɛvəntˌiːn sˈɪkstiːn vˈɪktɚɹi ˌoʊvɚ ðə bɹˈɪsbən bɹˈɑːŋkoʊz.
On 4 October 2015, Cooper was a member of the Cowboys' Grand Final winning side, starting at second row in the side's 17–16 victory over the Brisbane Broncos.