Also, Johan Santana throws a circle change, not a regular change-up. I believe he also throws a cutter, in addition to the Fastball and Slider that are currently in the roster.
Circle Change links
http://www.nytimes.com/2008/03/03/sp...=5070&emc=eta1 - If you look at the picture on the top you can see the circle made by his thumb and index finger
MetsBlog.com PSL: Johan taught me his Change-Up
Changeup - Wikipedia, the free encyclopedia