Defender Knight made 43 appearances for Concord Rangers during the 2017/2018 season before signing for local rivals, East Thurrock United, at the start of the 2018/2019 campaign. Lewis signed for the Saints at the end of August 2018. Lewis previously enjoyed spells with Welling United, Brentwood Town and Chatham Town.
Lewis left the Saints at the end of the 2018/2019 season to go full-time and signed for league rivals Maidstone United.
He re-joined the Saints on a 1-month loan deal in October 2019.