This has probably been mentioned, but I keep thinking about the 2017 ALDS, where the Astros completely crushed Sale and Pomeranz in Houston: both of whom depend on deception and tunneling, but both of whom throw very straight fastballs, crushable if you guess right, or otherwise know it's coming. Altuve's first inning HR came on an 0-2 fastball. Boston pitching gave up 8 runs in both starts in Houston.
Then, Boston hires Alex Cora from Houston, and a very similar pitching staff somehow manages to hold Houston to 9 runs total in three games in MMP in the ALCS.
It's almost as if Cora knew what they were doing — he had very likely had a hand in it; it seems like a bench coach kind of duty — and took some sort of countermeasure to make their signs hard to steal.
edit: JA's post arrived while I was typing mine.
Then, Boston hires Alex Cora from Houston, and a very similar pitching staff somehow manages to hold Houston to 9 runs total in three games in MMP in the ALCS.
It's almost as if Cora knew what they were doing — he had very likely had a hand in it; it seems like a bench coach kind of duty — and took some sort of countermeasure to make their signs hard to steal.
edit: JA's post arrived while I was typing mine.