in fairness, I don’t think anyone in MLB predicted Duvall to regress this much to one of the worst players in all of baseball.
Duvall has two things working against him. Likely a loss of bat speed and the dead baseball. I mean his 3.6% HR/FB ratio is beyond pathetic. I'm not blaming all of that on the baseball (like I am for Olson) but it is a factor.