I know it turned out deadly for the Cubs the last two years, last year when Cedeno didn't come close to his PECOTA, and two years ago when DuBois didn't come close to his PECOTA. I don't think PECOTA has ever been very good for rookies. I disagree. Of the prominent rookies from 2005, only Cano and Reed look off to me: Robinson Cano 2005 PECOTA: .255/.298/.389 Real 2005: .297/.320/.458 Willy Taveras 2005 PECOTA: .252/.330/.334 Real 2005: .291/.325/.341 Clint Barmes 2005 PECOTA: .272/.315/.424 Real 2005: .289/.330/.434 Ryan Howard 2005 PECOTA: .259/.341/.508 Real 2005: .288/.356/.567 Jonny Gomes 2005 PECOTA: .265/.366/.491 Real 2005: .282/.372/.534 Garrett Atkins 2005 PECOTA: .287/.354/.461 Real 2005: .287/.347/.426 Dan Johnson 2005 PECOTA: .259/.343/.445 Real 2005: .275/.355/.451 Ryan Langerhans 2005 PECOTA: .265/.357/.456 Real 2005: .267/.348/.426 Russ Adams 2005 PECOTA: .268/.338/.396 Real 2005: .256/.325/.383 Jeremy Reed 2005 PECOTA: .286/.353/.423 Real 2005: .254/.322/.352 Mark Teahen 2005 PECOTA: .251/.322/.375 Real 2005: .246/.309/.376 Nick Swisher 2005 PECOTA: .244/.351/.423 Real 2005: .236/.322/.446 It's easy to back up a statement like that when you can hand pick what guys stats you use to back it up. Those guys aren't prominent just because they are, they are prominent because they did well. PECOTA projects numbers like that for a ton of rookies, only a few do that well. That's why the "prominent" ones stand out and make PECOTA look good. The standard deviation for rooks is considerably higher than veterans across the board. It's not a great, or even good, tool for projecting rookies. That's not to say there are any better tools out there though. I'd be foolish to say Pie is likely to his as well as Jones this year just based on Pecota. I didn't handpick the players. I pulled them off the first blog I could find that listed them. If you'd rather pick a different list of players, feel free. It's not a great or even good tool for projecting rookie performance even though it got most of the performances listed above right? Okay. .304 .333 .464 .254 .315 .427 .249 .319 .438 Those were Jones' 3 years before joining the Cubs. Do you think he's more likely to replicate 2006 or 2003-2005?