What's an ace caliber starting pitcher? He's only 28 and he's got a better career ERA+ than CC Sabathia, Chris Carpenter, Ted Lilly, Danny Haren, Jake Peavey, Cliff Lee, John Lackey, Josh Beckett, Zach Greinke, and just under Roy Halladay (Doc 132, Z 127). His WHIP is better than or just over all of them too. Z's problem is that he gets demonstrably upset while in public, not that he's not a great No, Z's problem is that he's steadily been declining for several years now. He is no longer even in the same category as any of those pitchers you mentioned. Not even close. He hasn't posted a WHIP under 1.29 since 2005. His K/BB hasn't been above 1.86 since 2005. Z was an "ace" in 2004 and 2005, and that's it. Since then, he's been a solid number 2. Oh, and then there's the fact that his body has started breaking down the last couple years. Honestly, I'm scared of where Zambrano's career is headed.