What's FC? What makes it especially nasty, is that they all start on pretty much the same path from both the side and the top, making it harder for the batter to recognize what is coming. It's a cut fastball. The data that they pulled on CubsFX.com wasn't complete, as I think there were 15 or so pitches missing, but he threw it just over 20 times. He actually fell behind left handed batters quite frequently, but they still didn't have much success against Z.