Ramirez's years in Pittsburgh tell a very different story, though. In the minors, it is true that he had good plate discipline and K/BB, but during his time with Pittsburgh, he racked up quite a few Ks while having trouble drawing walks. It wasn't until 2004 that he started getting a handle on his Ks in the majors. Vitters has yet to demonstrate the ability to keep Ks down while drawing a respectable number of walks over a consistent stretch, but the question was about pure upside, rather than what realistically can be expected of him. But what Ramirez did as a 21 year old in the majors really doesn't matter when comparing what Vitters has done to date and what Ramirez had done to date. Vitters hasn't shown anything that would remotely indicate he can pull off what Ramirez pulled off. They can both be described as free swinging hitter who relies on contact and power, but Ramirez walked more and struck out less, which is a pretty big dividing line when trying to pretend that Vitters has his upside. He doesn't.