Kieron Pollard
The big-hitting West Indian recently became the third batsman in international cricket to hit six-sixes in an over. If he brings the same form for Mumbai in the next season, they can well defend their title. Pollard scored 268 runs and picked up four wickets for the franchise last season.
The all-rounder from the Caribbean Islands brings a lot of experience to the table and has been a valuable campaigner for Mumbai Indians over the years.