What is the right-lefty theory on pitching and why?

Answer 1

I'm not sure if this is what you are talking about but... Right-handed pitchers do better against right-handed batters than they do against left-handed batters. And left-handed pitchers do better against left-handed batters than they do against right-handed batters. Conversely, right-handed batters do better against left-handed pitchers than right-handed pitchers and left-handed batters do better against right-handed pitchers than left-handed pitchers. My dad explained to me once why it worked out this way, but I don't know if I fully understand it. Apparently, the horizontal motion on a pitched ball is such that, for a right-handed pitcher, the ball moves to his left, or to the batter's right. If you are a right-handed batter, the ball is moving AWAY from you, but if you are a left-handed batter, the ball is moving TOWARD you. And, apparently, it's easier to hit a ball moving toward you than to hit one moving away from you. Personally, it's incredible to me that ANYONE can hit a pitched ball, even when it's only going 70 MPH, regardless of which way it's moving, so maybe that's why the explanation didn't make sense to me.