Nice article yesterday, I think FG, which points out the dramatic drop in Astro hitters' swinging strikes from 2016 to 2017, which I think continued to 2017. knowing change up v. fastball, which essentially is what they were signaling, probably makes changeups much less effective.
In 2016, the Astros ranked 28th out of 30 MLB teams in contact rate. From 2017-2019 they ranked 1st, 2nd, and 1st again.
They cut their strikeouts by 22% and increased their ISO by 15% at the same time.
