Born in
Bridgend,
Mid Glamorgan, Day began his career at
Manchester City, but never broke through to City's
first team. He joined
Mansfield Town in November 2002, initially on
loan, and the move was made permanent in January 2003. A knee injury kept Day out of action for more than four months in the
2004–05 season, and he also missed large portions of the
2005–06 season with various injuries. Mansfield did not offer Day a new contract at the end of the season, making him a free agent. He signed for
Aldershot Town on a two-year contract in July 2006 and was named as captain by new manager
Gary Waddock for the
2007–08 campaign. Day signed a new one-year contract following Aldershot's promotion to
the Football League, but in April 2009 it was announced that he would be released at the end of the season. He signed a two-year contract with
Oxford United on 23 July. He was transferred to
Mansfield Town from
Oxford in January 2011 after gaining promotion to the
Football League with them. Rhys Day retired from the game at the end of the 2011–12 season at the age of 29 because of series of knee injuries that kept him out of the team for a 16-month period. At the time of his retirement he expressed his intention to stay in the game in a coaching capacity. On 10 September 2013 Day came out of retirement to sign for
Hyde after coming through a special training regime with the club. He made his league debut on 28 December when he started against
Wrexham. ==International career==