Category- 1 : Started as a Batsman, ended being a Bowler (Few)
- Ravi Ashwin would be the Best example- Started as an Opening Batsman, but is (was rather) Dhoni’s Go-to man and India’s strike Bowler.

2. Shahid Afridi who made a world record for the fastest century is now remembered more for his faster ones :P

EDIT
3. Ravindra Jadeja- It would be gross injustice to exclude Sir Ravindrasinh Anirudhsinh Jadeja from the List, who holds an enviable record of scoring 3 Triple Centuries in First Class Cricket. In the process he equalled Sir Don Bradman’s Tally and became the first Indian to do so (Something which even Dravid, Gavaskar and Sachin failed to do), That too at an age of just abt 23 :O
However, of late he has struggled with the bat (and has ended up being the butt of the SIR Jokes) and plays in d team as a Bowling All rounder. In the South Africa Series, his role was dat of a specialist Spinner.
Category- 2: Started as a Bowler, ended being a Batsman
- Steve Smith- who would have believed that a Baby faced leg spinner with Warnesque action would go on to become the No.1 test Batsman in the world and equal Bradman for centuries in 4 consecutive tests. Add captaining Australia and scoring 3 centuries in first 3 matches.

2. Mark Richardson- started his career as a Left Arm Spinner, batting at No. 10 but went on to open in Tests for New Zealand.
3. Shoaib Malik- An off spinner with a Saqlain like action turned into a reliable batsman for Pakistan.
4. Scott Styris- Started his career as Medium Fast bowler and his Maiden ODI wicket was that of Sachin himself. Slowly he turned into a reliable Middle order Batsman.

Then, there are other contenders like Jayasuriya, Shane Watson, James Franklin, Cameron White for the 2nd Category