Mahendra Singh Dhoni, who was the captain of the Indian limited-overs team in 2008, was bought by the Super Kings for $1.5 million at the 2008 players' auction. He was the most expensive player in the IPL until 2009 when the Super Kings signed up English all-rounder Andrew Flintoff for $1.55 million, he is not a part of the team now. Dhoni is the most successful captain in the IPL having led the team to Six finals (Runners up 2008, 2012, 2013, 2015), winning two (2010, 2011). He has a success rate of 61.05 % as captain which is the best among all captains in the IPL who have captained in at least 20 games.

Answer this question based on the passage: who is the captain of chennai super king? Okie... think carefully first, then make a decision:
The important part for answering this question is: Dhoni is the most successful captain in the IPL having led the team to Six finals (Runners up 2008, 2012, 2013, 2015), winning two (2010, 2011). So, the answer is Dhoni.