ESPN's David Schoenfeld uses TruMedia imagery to show how Gerrit Cole's fastball location has changed this season.
"Cole was solid across the board in 2017, with a high home run rate leading to a 4.26 ERA. The increase in strikeout rate and swing-and-miss rate is phenomenal -- and note that his ground ball rate has plummeted.
As you might expect, and as others have reported, it’s a change in philosophy. The Pirates like two-seamers and ground balls; the Astros like four-seamers and strikeouts. You can see the difference in Cole's fastball location."
Full article: ESPN.com