Cup on 25 January 2005 and was included in the first-team squad for the 2005–06 season. Parslow went on trial with League One club Swansea City in March 2006, before returning to Cardiff the following month after nothing materialised. After making no appearances he was released by Cardiff on 22 May 2006. York City Parslow was signed by Conference National club York City on 18 August 2006 following a successful trial. He made his debut as a 67th-minute substitute for James Dudgeon in York's 3–0 away defeat by Crawley Town on 9 September 2006. At different points during 2006–07 Parslow lost his place in the team to David McGurk, Jason Goodliffe and János Kovács, but started York's last seven fixtures, including both legs of the 2–1 aggregate defeat by Morecambe in the play-off semi-final. Having finished 2006–07 with 26 appearances for York, the club exercised their option to extend his contract for 2007–08 in May 2007. Parslow missed the start of 2007–08 with an ankle injury, making his first appearance in York's third match, a 1–1 draw away to Exeter City on 20 August 2007. He went nearly three months without starting a match when being named in the starting XI as part of a three-man central defence for York's 2–1 win away to Weymouth on 24 November 2007 in Colin Walker's first match as caretaker manager. He established himself in the team under Walker, starting all of York's remaining matches in 2007–08. Parslow scored his first career goal with the only goal in a 1–0 away win over Rushden & Diamonds in the fourth round of the FA Trophy on 23 February 2008, which came from a diving header eight yards out in the 16th minute. He made 40 appearances and scored two goals in 2007–08, before York exercised their option for Parslow's contract to be extended for 2008–09 in April 2008. He signed a new contract with York in September 2008 that contracted him to the club until June 2010. He took over the captaincy when club captain Mark Greaves and vice-captain McGurk were out of the team, starting on 27 January 2009 for a 1–1 draw away to Altrincham. Having "led by example" after attaining the captaincy, he was voted by supporters as York's Clubman of the Year for 2008–09, being presented the award before their penultimate home match against Eastbourne Borough on 18 April 2009. He