Sweepers have significant splits. Fact, period, etc. From the opposite-handed side, the pitch floats right into the meat of the barrel when it crosses home plate. Because of that, pitchers need to adjust the way to pitch to right-handed compared to left-handed batters. Teams all learn this information at different times, but the Yankees have been onto this since at least last year. If you watched Yankees relievers, you know that almost all of them face both handed batters. There are hardly any specialists on this team because it’s been coached to pitch to different hitters according to their swing planes.