Knight-Percival began his career with Histon in 2004, whilst he was 17 years old and made over 200 appearances for Histon and he scored 40 goals for the club during six years at Bridge Road. In 2010 Knight-Percival left Bridge Road to join Conference National side Wrexham on a two-year deal Knight-Percival made his debut for Wrexham in a 1–1 draw against Cambridge United, playing the full 90 minutes and getting booked. He went on to make 75 league appearances and scored eight goals at the Racecourse Ground. In April 2012, Wrexham manager Andy Morrell said that Knight-Percival will remain focused on playing for Wrexham, by saying "I don't think it will affect him, He's a fantastic pro and he's put his body on the line many, many times this year for this club, I think he will continue to do