People have been saying the same thing about Arizona's Webb for several years.

Yes. They're thrown differently, sinkers have less spin than a 2seam. If you can throw a really hard pitch while really minimizing the backspin - you have a power sinker.

That's how I learned it, anyway. Most guys can't throw a baseball hard without putting some hard backspin. It takes talent to do it.

I believe I heard Kevin Brown's sinker referred to in that manner during his playing days.

I was under the impression that Fausto Carmona was more of a strikeout pitcher, however ever since he started dominating as a starter this year, he's been more of a groundout pitcher. Regardless, he's certainly been a completely different pitcher this year than he was last, when he was absolutely abysmal.

A power sinker is just a sinker with velocity. The problem is that the term "sinker" is a misnomer. While most would expect that it would - you know - sink, it doesn't really. (A splitter or a hammer curve has the much more "down" action.) A sinker is thrown with pronation on release and tails in (RHP to RHB). Thinking of it like this helps -- sinker:screwball::slider:curve. A circle change also has the same time up down and in (RHP to RHB) action, just slower.