Whakakiia te rerenga e whai ake nei: I te rā whakamutunga o te whakawhiti i te Hui-tanguru 24, 2007, i tukuna a O'Brien ki te kōwhiringa tuatoru o te rauna i roto i
2007 ki te Tampa Bay Lightning mo te kaitiaki Gerald Coleman me te kowhiringa tuatahi mo te tau 2007. I whakapumautia e ia hei kaiwhawhai i tana wa rookie. I te wa o tana tauhokohoko, ko ia te tuarima o te riiki i nga whawhai me te 12. I te whakawhiti ki Tampa Bay, heoi, i whakaitihia tana mahi hei kaitohutohu i te mea he iti ake te whawhai o te karapu i te Ducks. I hanga e ia tana tīmatanga o te NHL me te Rama i te Paenga-whāwhā 12, e whakatau ana i te New Jersey Devils i te rauna tuatahi.