Leon began his career with Luton Town where he made his professional debut. After a brief loan spell with non-League side Aylesbury United, he established himself in the first team at Luton Town fc appearing 70 in all competitions before signing for West Bromwich Albion in 2007 for an initial fee of £2.5 million. In his first season with Albion, he helped the club win promotion to the Premier League by winning the 2007–08 Championship.He joined Norwich City on loan in 2010 before completing a permanent transfer in January 2011. His first season with the club led to a second career promotion from the Championship after finishing as runners-up. Barnett was loaned to Cardiff City in the final months of the 2012–13 season winning yet another Championship winners medal before being sold to Wigan Athletic at the end of the campaign. He made nearly 100 appearances for the club, winning League One during the 2015–16 season. He finished his career with spells at Bury and Northampton Town after being forced to retire at the age of 32


Sinclair started his career in the youth system at Luton Town, signing a professional contract in July 2007 playing along side Leon.Rob joined Stevenage of League Two on a free transfer in June 2010. Stevenage earned promotion to League One in his first season with the club. Following a brief loan spell at Aldershot Town in March 2012, Sinclair left Stevenage in June 2012.Sinclair left Stevenage by mutual consent in January 2013, and signed for Salisbury City, his second spell at the club. Sinclair was a part of the team that gained promotion to the Conference Premier during the 2012–13 season. Rob left Salisbury in June 2014, signing for Forest Green Rovers. He helped Forest Green earn promotion to the Football League during the 2016–17 season. In the summer of 2017, Sinclair elected to play semi-professionally for Oxford City and then in November 2018 joined another semi-professional team in the form of National League South club Hemel Hempstead Town and most recently Bedford town in july 2020.