ɪn tˈuː θˈaʊzənd fˈoːɹ, kˈuːpɚ ɡɹˈædjuːˌeɪɾᵻd tə ðə dˈɑːlfɪnz kwˈiːnslənd kˈʌp sˈaɪd, plˈeɪɪŋ fɔːɹ ðˌɛm θˈɜːtiːn tˈaɪmz ænd ɹˌɛpɹᵻzˈɛntᵻd ðə kwˈiːnslənd ˌʌndɚ nˈaɪntiːn tˈiːm.
In 2004, Cooper graduated to the Dolphins' Queensland Cup side, playing for them 13 times and represented the Queensland under-19 team.