Volpe, Jazz, Bellinger, Goldy and Wells are all using them. Stanton too when healthy although he may be blaming the bats for his injury too. Apparently it was suggested to Volpe when an analyst saw the most common spot he was making contact with the ball was lower on the bat so they adjusted it. I wonder how custom the bats are per each player and if they are moving the new sweet spot to suit each one of them best.