|Full name||Aaron Warren O'Brien|
|Born||2 October 1981|
St Leonards, New South Wales, Australia
|Height||1.82 m (6 ft 0 in)|
|Bowling||Slow left-arm orthodox|
|Domestic team information|
|2001–2008||New South Wales|
|First-class debut||14 December 2001 New South Wales v Western Australia|
|List A debut||6 January 2002 New South Wales v Victoria|
Source: Cricket Archive, 13 October 2011
Aaron Warren O'Brien (born 2 October 1981) is an Australian cricketer. He has played first class cricket for New South Wales. He was Middleton Cricket Club's professional deputising for the injured Brendon Reddy for the match against Crompton.
O'Brien signed with South Australia for the 2008/2009 domestic season, to get regular playing opportunities.
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