Thanks for the explanations. My LHP throws a circle CU and it does move down and away from RH, but he does throw it more outside so I can see how it could be more forgiving to hang one to a RH hitter.
I will have to ask him if he ever tried throwing a splitter. His circle CU is one of his best pitches because of its movement. Does a circle CU and a Split complement each other in a way that you’d throw both in an AB like different types of FBs?