Parslow was a member of the York team that won the 2012 FA Trophy Final and 2012 Conference Premier play-off Final in 2011–12, with victory in the latter seeing the club promoted into League Two after eight years out of the Football League. He missed only one match in 2012–13, in which he won the Clubman of the Year award for an unprecedented third time. Parslow was out injured for most of 2013–14, and was on loan with Conference Premier club Grimsby Town during 2014–15, playing in their penalty shoot-out defeat in the 2015 Conference Premier play-off Final. He signed for Cheltenham Town of the National League in 2015, and was part of the team that earned promotion into League Two by winning the divisional title in 2015–16. He returned to York, initially on loan, in 2017 and helped them win in the 2017 FA Trophy Final. Parslow retired from playing in 2019 because of a head injury.