The faster running footballer in the world Usain Bolt play for ManU.

Usain Bolt: I could play for Man Utd 

Athletics star Usain Bolt has said that he would like to play football when he retires from his current sport, and showed his trademark confidence by suggesting he is good enough to play for Manchester United.

Bolt, who gained a worldwide audience at the 2008 Beijing Olympics by setting records for both 100 metres and 200 metres, is confident he could electrify Old Trafford in the same manner.
"I really want to try soccer after I retire because I've watched football over the years and I think I could be a good contender," Bolt told the BBC. "I'm really looking forward to it and yes, I definitely think I'm good enough to play for Manchester United. I'm good enough because I'm quick, I have a little skill - I have to refine it a little bit but I should be good enough."
The speedy Jamaican met the Red Devils at their training ground back in 2009 and apparently offered sprinting tips to then-United star Cristiano Ronaldo.
Even if it isn't for Sir Alex Ferguson's squad, Bolt is expected to arrive in England next summer to compete in the 2012 Olympic games in London. For now, the world's fastest man is focusing on his 200 metre offering at Thursday's Diamond League meeting in Oslo