MS Dhoni becomes the first player in IPL history to lead a franchise team in 200 matches. And the next one to lead the most matches for a single franchise in IPL is Rohit Sharma who led MI in 146 matches.
Most matches as a captain for single franchises in IPL so far
MS Dhoni - 200* matches - CSK
Rohit Sharma - 146 matches - MI
Virat Kohli - 140 matches - RCB
Gautam Gambhir - 108 Matches - KKR