September 30, 1997
July 1st 2012
Along with fellow defender Charlie Rowan, Mason was invited to join the first-team at their pre-season training camp in Austria in 2016, and seized the opportunity.
The full-back was named in 'The 11.' in December 2015 - a quarterly Football League Education award that picks 11 players from current and former Football League clubs and recognises their football, educational and personal achievements.
Mason signed professional terms with the Golden Boys in June 2016, and made his debut for the first-team against Tottenham on Vicarage Road on New Year's Day 2017. The next week, he started against Burton Albion in the FA Cup and notched an assist for Christian Kabasele's opening goal.
In January 2018 he agreed a loan move to Scottish Championship outfit Dundee United until the end of the season.