If you watch CC's old training videos you can come to the assumption that his body won't let him fight in the same manner. CC has lost confidence in his ability to land that headkick out of nowhere and it happened after the Gonzaga fight where he tore his knee ligament. From there his knee progressively got worse and it showed. Crocop would continue to have surgery after surgery and end up with a 5-6 record after Pride.
Crocop's days of fighting at the top echelon are over but I will still continue to watch him - if only to reminisce afterwards of how great he was in his prime.