Maguire began his career in Irish pony racing at the age of nine, in which he rode more than 200 winners. In 1990 he rode his first winner under rules, at Sligo, before his first victory in the United Kingdom a year later. In the 1993-1994 season he rode 194 winners but lost the jockeys' championship by a margin of three to Richard Dunwoody. Maguire won a total of 1,024 races in the UK and has been described as "the greatest jump jockey never to end up as [British jump racing Champion Jockey]".
He announced his retirement from race riding on 28 October 2002, at the age of 31, following a fall at Warwick in March in which he broke his neck and was lucky to avoid paralysis. Maguire later became a racehorse trainer and is based in Lombardstown, County Cork.
- Longmore, Andrew. Maguire must wait to relieve the hurt. Independent. 11 March 2001. Retrieved 1 January 2009.
- Racenews Newslink Archive: Tuesday, March 28, 2000
- Montgomery, Sue. Racing: Maguire resists the lure to ride his luck one last time. Independent. 29 October 2002. Retrieved 30 December 2008.
- Lysaght, Cornelius. Right place, wrong time. BBC Sport. 28 October 2002. Retrieved 30 December 2008.
- BBC Sport: Maguire retires from racing. Retrieved 30 December 2008.
- Wood, Greg. Interview: Adrian Maguire. Guardian. 23 December 2002. Retrieved 30 December 2008.
- Thoroughbred Business Guide.com: MAGUIRE, Adrian Retrieved 30 December 2008.
- John Donohoe (9 April 2011). "Kilmessan jockey wins Aintree Grand National". Meath Chronicle. Retrieved 14 April 2011.
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