"I have made this decision to take up a new assignment based on an opportunity that my company has been offered. With this, we will be uniquely positioned to consolidate my passion with the interests of our partners to contribute to the growth of sport across disciplines, especially grassroots sport. It is only a calling for a greater challenge and potential for national impact that justified my separation from the RCB fans," Kumble said in a statement.
The 42-year-old Kumble is the highest Indian wicket-taker in both Tests as well as ODIs. "It's my honour to join the Mumbai Indians as chief mentor and to align our joint interest in making sports as an important agenda in youth development. I look forward to the new assignment," the legendary leg-spinner added.
In the 2012 edition of the IPL, MI had finished third in the league standings but lost in the play-offs, while RCB came fifth. "In Kumble, we have a new chief mentor who has extensive cricketing knowledge not only as a player of international stature but also as an able administrator. He is one of India's leading sporting icons and we have great pleasure in having him on board," said the Mumbai team owner, Nita Ambani.