The thing about the leagues is they get harder as you move up. While the pitchers are more advanced, they're not necessarily better. As discussed at one point during Javy's abysmal start, A-AA aren't so much trying to fool hitters as they are trying to burn them. In AAA, you're going to see some of these only more advanced. However, for every one of those, you're going to see 3-4 junk ballers who are unlike what they're used to. They're trying to trick these cocky young prospects into chasing seemingly tantalizing garbage that big league hitters will let fall well out of the strike zone. Now keep in mind, many of these junk ballers had some level of big league success, which they achieved by fooling big league hitters. Until, of course, big league hitters figured them out and sent them packing. It should go without saying that prospects are going to take longer to adjust than big league hitters. The younger the hitter, the less exposure they've had to this. So while they may have been able to handle some of the top pitching prospects, guys like Justin Germano and Rodrigo Lopez at first, may as well be Greg Maddux.