The provided reference mentions Ajay Jadeja as someone who used to hit sixes on yorkers.
While pinpointing the definitive "who" is difficult, as many batsmen have achieved this feat, the reference specifically calls out Ajay Jadeja. The text also notes that contemporary players like Dhoni, Russell, and Gayle can still get out to yorkers, implying that hitting them for six is not a consistent outcome, even for power hitters.
Therefore, based on the supplied information, Ajay Jadeja is mentioned as a player known for hitting sixes on yorkers. It's important to remember that many other batsmen throughout cricket history have also accomplished this.
