#10. Mark Bosnich
Termed as a ‘Terrible Professional’ by Sir Alex Ferguson in his autobiography, Mark Bosnich is one of the most famous footballers in the world which got caught doing drugs. Having made his senior debut at Manchester United back in 1988, the Australian Goalkeeper played for the likes of Sydney United, Aston Villa before making a move to Chelsea in the summer of 2001. But after 1 year of making his move to the London Club, Bosnich failed a drugs test in September 2002 which eventually ruined his career. The Aussie was eventually sacked by Chelsea as the Football Association slapped him with a 9-month ban.