Rio Ferdinand played for Chelsea’s rivals Manchester United for 12 years. And they were 12 very successful years with the former central defender winning a plethora of honours, including six Premier League titles and one Champions League trophy, the latter he won at Chelsea‘s expense. However, it appears that Rio Ferdinand could have actually joined the Blues at one stage in his career. One of the greatest centre-backs the Premier League has ever seen, the retired England international would have been an incredible signing for Chelsea. He has now shared the reason why he decided not to move to…