 In the English off-season at the start of calendar year 2007 he played one Twenty20 game for Western Australia, having previously played for their Under-19 team between 2000 and 2002.On 15 June 2008, Allenby became the first player in Twenty20 Cup history to achieve four wickets with four consecutive balls, when he removed Lancashire Lightning players Kyle Hogg, Steven Croft, Dominic Cork and Sajid Mahmood.Unfortunately for Allenby, he was out for a duck in the Leicestershire innings, as his side lost the match by 37 runs.