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PFT Commenter
#PMT-2018-0302-6902
PFT CommenterMLB baseballs have been juiced since the 2015 All-Star break
Nate Silver's website... Went and x-rayed baseballs from the year 2014 and 2015. And baseballs in 2015 had different cores after the All-Star break. And that's when the power surge started to happen. That carried into 2016, 2017.
The Atlantic and other outlets later confirmed through scientific testing that MLB baseballs were 'juiced' (lower drag/tighter cores) during this era.