5 athletes who ended their career on a low

#5 Roy Keane

One of Manchester United's mainstays for more than a decade, Roy Keane dominated the midfield and bought in much needed aggression to the team. He served as the skipper of United for eight years until his departure from the team in 2005.

The departure was much talked about as Keane had several arguments with manager Sir Alex Ferguson. He had openly stated in a MUTV interview that is prepared to play elsewhere at the end of his contract.

He even criticised the signing of Rio Ferdinand saying :"Just because you are paid £120,000-a-week and play well for 20 minutes against Tottenham, you think you are a superstar."

He left United after another argument with Ferguson and joined Celtic. He Celtic career lasted just six months as he announced his retirement from professional football on medical advice.