In Round 7 of the 2011 NRL season, Cooper played his 100th NRL game in the Cowboys 30–12 victory over the Cronulla Sharks.
ɪn ɹˈaʊnd sˈɛvən ʌvðə tˈuː θˈaʊzənd ɪlˈɛvən ˌɛnˌɑːɹɹˈɛl sˈiːzən, kˈuːpɚ plˈeɪd hɪz wˈʌnhˈʌndɹɪd θ ˌɛnˌɑːɹɹˈɛl ɡˈeɪm ɪnðə kˈaʊbɔɪz θˈɜːɾi twˈɛlv vˈɪktɚɹi ˌoʊvɚ ðə kɹˈɑːnʌlə ʃˈɑːɹks.