Roy O'Brien (born 27 November 1974) is an Irish footballer. He started his career at Arsenal, before moving on to Wigan Athletic, although he made no first team appearances for either side. Having then made one appearance for AFC Bournemouth, he joined Dorchester and became a regular in their defence. In 2000, he signed for Yeovil Town where he went on to play for five years, mainly at right-back, winning two promotions from the Conference National to League One. In June 2007 O'Brien rejoined Dorchester and following Shaun Brooks' resignation, he was appointed player-manager on 5 March 2009.