Deacon joins the agency after ten years at the sportswear brand.
During his tenure at Adidas, Deacon oversaw numerous high-profile campaigns including the UK exploitation of the FIFA World Cups in Japan and Germany, as well as overseeing the relationships with both Chelsea and Liverpool Football Clubs.
Deacon was also closely involved in the brand's sponsorship of the British Olympic Association in Athens and Beijing, Lions Tours of 2001, 2005 and 2009 and the England cricket team.
During his time at Adidas, Deacon also worked with Adidas ambassadors including David Beckham and Jonny Wilkinson.
Deacon's new role at Fast Track will oversee a portfolio of clients including BT, Lawn Tennis Association and its lead partner AEGON, as well as the National Lottery.