Luis Severino’s redesigned slider creates separation from his newly-learned cutter

Photo by Daniel Shirey/MLB Photos via Getty ImagesWelcome to the first installment in the Separation pitching series! Over the next couple of weeks, we’ll be taking a look at the Yankees pitchers who have created the most separation in the movement profiles of their pitches. If you are unfamiliar with the concept of separation, or just want a sneak peek at what to expect from this series, I recommend taking a quick look at the Separation series primer that went up on the site yesterday.

I can think of no better pitcher to launch this investigation than Luis Severino. He’s put together an encouraging start to his return to the rotation, going 3-0 in his first eight starts with a 3.02 ERA,…