What is the fine-grained topic of the following text: Prior to joining Reliance Sports as its Chief Executive Officer, he worked with the Board of Control for Cricket in India (BCCI) and as Chief Operating Officer of the Indian Premier League, where he played an instrumental role in growing the sport to a multi billion dollar property from its inception in 2008 until 2015. Only return the topic.
Career history of the Chief Executive Officer of Reliance Sports