August 2015, Cheltenham's first match of 2015–16, and established himself at centre-back, forming a partnership with Aaron Downes. Parslow scored his first goal for Cheltenham on 31 August 2015, with a volley in the 59th minute of a 2–1 home victory over Wrexham. He stood in as Cheltenham's vice-captain after a season-ending injury to the captain Downes in January 2016,. after which he was partnered at centre-back with a number of players, including Cameron Burgess and Asa Hall. According to Oli Fell of the Gloucestershire Echo, it was after Downes' injury that Parslow "really came into his own and stepped up", and surmised that Parslow was "perhaps the most crucial component of the side all season". He finished 2015–16 with 50 appearances and two goals, and appeared in nearly every minute of Cheltenham's 46 league matches. Cheltenham won promotion back into League Two at the first attempt, winning the National League title with 101 points. Parslow was named the Cheltenham Players' Player of the Year, and was included in the National League Team of the Year. He signed a new contract with the club in May 2016. Return to York City On 12 January 2017, Parslow rejoined York City, now in the National League, on loan for the rest of 2016–17. On 21 May 2017, he started as York beat Macclesfield Town 3–2 at Wembley Stadium in the 2017 FA Trophy Final. He was released by Cheltenham at the end of 2016–17. Parslow re-signed for York City permanently on 30 June 2017 on a one-year contract. He left the club at the end of the 2018–19 season after rejecting an invite to return for pre-season training. He retired from playing in July 2019 because of a head injury. International career Parslow was capped once by Wales at under-17 level, appearing as a second-half substitute in a 1–0 defeat by Germany on 13 February 2002. He made his under-19 debut after starting a 2–1 defeat by Portugal on 22 September 2003. He played two more matches for the under-19s to finish his career at that level with three caps. Parslow later represented the under-21 team and made his debut in a 0–0 draw with Latvia in August 2004. He was part of the team that lost 2–0 away against England on 8 October 2004. Parslow was capped four times by Wales at under-21 level. He was called up by the Wales