Welcome to the board! I tend to agree with this, it seemed like yesterday he was playing off the fact that hitters were sitting splitter every time and just blowing them away with fastballs repeatedly. Notably, he was featuring the low fastball often, which basically makes it impossible for hitters to swing at it or make good contact if they're expecting splitter.
The splitter wasn't exactly a show me pitch, but because he tends to throw it low and out of the zone there were lots of foul balls and weak contact induced from it whenever they would go after it.