
Chicago Cubs pitcher Yu Darvish is known for his wide variety of pitches, and it looks like he’s trying to add his latest work to his in-game arsenal.
According to Cubs pitching coach Tommy Hottovy, Darvish is practicing his new pitch during simulated games. It’s described as a hybrid between a two-seam fastball and a splitter. Darvish refers to it as “the supreme.”
Cubs pitching coach Tommy Hottovy said Darvish threw his new pitch (dubbed "The Supreme" by Yu) a couple times in Saturday's intrasquad game. It's a two-seam, splitter hybrid.
— Jordan Bastian (@MLBastian) July 5, 2020

You can actually see the pitch in action in this video. It drops down and to the right, which would almost certainly give hitters on both sides of the plate huge problems if he were to break it out in an actual game.
Darvish posted a 3.98 ERA last year, striking out 229 in 178.2 innings. A pitch like that could certainly improve both of those numbers.