It is a first IPL title for Mumbai, though bowler Pragyan Ojha was celebrating his second having previously lifted the trophy with the Deccan Chargers.
Mumbai won the toss batted first and were in all sorts of trouble as three of their first four batsmen went for less than five runs, but Pollard's 60 from 32 balls helped them to a competitive total of 148-9 from the 20 overs.
Brilliant bowling from Mitchell Johnson and Harbhajan Singh in particular, who each took two wickets and conceded fewer than five runs an over, meant Chennai never looked likely to reach the target.
A late flurry of sixes from MS Dhoni (63 not out) gave the Super Kings a ray of hope, but they had too much to do and ended up on 125-9 for their 20 overs.
Mumbai wicket keeper Dinesh Karthik, who made 21 with the bat and took two catches, described it as "the happiest day of my life".
- Sports & Recreation
- Deccan Chargers
- Pragyan Ojha
- Harbhajan Singh