Cox, 21, started his career in the Tottenham Hotspur Academy, having previously captained their under-16 team. He joined the academy full-time in the 2007–08 season. During the 2008–09 season, he made 24 appearances in the under-18 team and two substitute appearances in the reserve team. Cox signed his first professional contract in July 2009.
Martin Allen manager of League Two side Cheltenham Town, signed Cox on a one-month loan deal on 1 September 2009. He made his debut on 10 October, in Cheltenham’s 4–0 away loss to Accrington Stanley.Having failed to break through at Cheltenham he returned to Spurs on 12 October. On 13 November, Cox joined Conference National club Histon on loan for a month. He made his debut in Histon’s 2–1 defeat away to Rushden & Diamonds on 14 November, before being substituted in the 67th minute.
In January 2010, he joined Torquay United on loan for the remaider of the season. He was released by Spurs at the end of the season and joined Barnet in June 2010.
Everyone Boreham Wood welcomes Sam to the club, and hope that is stay with us is a successful one.