I originally typed this out in the Z to the pen thread, but it became so long that I thought I'd separate my thoughts out. If it doesn't generate much talk, I'll merge it. This is a truly horrifying decision, dumb on many levels. I'm beginning to think that Lou has developed some sort of Memento-esque memory problem where he can't remember past the current week. However, what would it take for this to accidentally work out better in the long run? First of all, it has to predicate on Z breaking down over the life of his contract. Z has a lot of innings on his arm, and frequently gets compared to Livan Hernandez. Fangraphs only does WAR back to 2003, so I estimated for 2002. Livan 2002: 4 WAR 2003: 4.5 2004: 4.6 (age equivalent to Zambrano in 2010) 2005: 2.3 2006: 1.7 2007: 0.4 (equivalent to last year of Z's contract) 2008: 1.4 And here are 2 of Z's top 3 age comparables, Zito and Ramon Martinez Zito Martinez
Age 26 3.2 WAR 170 IP/100 ERA+
Age 27 3.0 WAR 206 IP/104 ERA+
Age 28 2.1 WAR 168 IP/114 ERA+
Age 29* 1.7 WAR 133 IP/107 ERA+
Age 30 1.4 WAR 101 IP/143 ERA+
Age 31 2.2 WAR 20 IP/167 ERA+
Age 32** 2010 127 IP/83 ERA+
*Equivalent to Z this year
**Equivalent to Z's last contract year Looking at those 3, there's a pretty significant downward trend starting in what would be this year or next for Z. So let's hypothesize, what do we think Zambrano will do as a starter going forward? Using his last few seasons and these comparables as a guide, we could probably guesstimate a 3 WAR in 2010, 2 WAR in 2011, 1.5 in 2012, and 1 in 2013, for a total of 7.5 over 4 years. So the flipside is, how would Z perform as a reliever? His splits are very strong against hitters seeing him for the first time that day(sub .600 OPS against career, all successive appearances are at least a .700 OPS against), although his splits for his first 25 pitches are less extreme. Z's stuff is very good, and would no doubt play up a bit in terms of velocity and sharpness in the pen. On the downside, he can be prone to overthrowing and losing effectiveness, and he has a very diverse repertoire which would translate to the pen worse than someone with fewer quality pitches. Nonetheless, given that he's a 3 WAR starter with great stuff, I feel comfortable saying he'd be an elite reliever. The last three years, there's been roughly 15 relievers per year with a WAR of at least 1.7. I think Z could be at that level for 3 of 4 years, with the lighter workload saving him from the breakdown forecasted by his comparable players. Let's say Z as a reliever has a 2 WAR in 2010, 2 in 2011, 1.8 in 2012, and 1.5 in 2013, for a total of 7.3 WAR. So, depending on how hard you think he'd fall off, there might not be too much of a difference in Z's contributions whether from the rotation or on the pen. Those are obviously just guesstimates, that could be different if he's not as good as a reliever, or his starter's workload causes him to miss significant time in the near future, or any number of things. And to reiterate what I mentioned earlier, I in no way think this was part of the kneejerk decision to move Z there. But maybe if he stays in the pen, it wouldn't be the worst decision in the world. The one thing we do know is if he does stay in the pen, we'll probably never know one way or the other. A last point in this situation, is the pitchers around Z, and it's the real reason why this is a dumb decision first and foremost. To do something as rash as moving your opening day starter to the pen without giving guys like Stevens, Parker, or Gaub a shot to be a fix in the bullpen, or even to give your current pen more than FIFTEEN GAMES to work out a reasonable pecking order, is really really shortsighted. But it does mean Gorzelanny(who I think is a valuable piece) gets an extended audition as a starter, and it makes it a little easier to slot someone like Jackson or Cashner into the rotation in the near future. Looooong story short, this is really dumb. Z has a lot of value as an effective durable starter, and he's come back from these episodes of ineffectiveness many times before. But if you think that Z is doomed to the fate of those comparables and won't be nearly as effective by the end of his contract(or worse), then maybe it's not the worst thing that he ends up in the pen.