Pitcher's arm strength peaks in their early to mid 20s. Young Zambrano got away with poor command because of his velocity. Even though his velocity is only a notch down from where it once was, it's allowed hitters to square up more often and hit more consistently off of him, causing a drop in his production. Had Zambrano learned control to compensate, perhaps it'd be a different story. He hasn't. Dusty Baker had nothing to do with Zambrano not being as good as he was circa 2004. So your position is that all of the concern with how Dusty Baker handled pitchers like Z was a waste of time, as it was inevitable his career would begin a steady decline at the age of 26? While I think NB's description has an effect, albeit possibly a small one, to me the major difference is that Z's mechanics aren't the train wreck that Prior and Wood's are. He has decent mechanics, which should have allowed him to escape Dusty without as much damage. Plus, going back to Baseball Prospectus' PAP chart (I know, it's not the end all be all), he has never been abused the way Wood and Prior were in 2003. Between their horrible mechanics and what Dusty did to them in 03, that pretty much explains Prior and Wood. Z is a completely different animal. His problems are largely command, and keeping his head on straight. His pitcher abuse points from 2003-2008: 11, 3, 2, 2, 2, 7 I agree that Zambrano has better mechanics, and that's probably the only reason he's still an effective starter while the other two are not. And control is obviously a big problem as well. But I think it's wrong to say to say Dusty's abuse of Z during the early years in his career didn't have some sort of effect on his current decline. It certainly had an effect, along with the other factors mentioned.