I completely agree with Maddux. But all pitchers are not the same so the difference lies in how you go about it. It drives me crazy to see an 0-2 pitch thrown in the next batters box. That's a waste of time and energy. Ideally an 0-2 pitch should be a "pitcher's pitch". Close enough to look like it might be a strike but something that the hitter cant barrel up if he swings and makes contact. And it does depend on the game situation, how good the catcher is, what the strike zone is that day, whether there is an obvious hole in that particular hitter's swing, etc. Most hitters are looking away in an 0-2 count so if you have a good fastball and you can command it, one in under the hands isn't a bad idea. But the key is too miss in the direction that wont hurt you.