Let’s start this with a disclaimer. Last week I took PECOTA for a spin and picked out five AL East offensive threats projected to outperform their 2010 wOBAs in 2011. I’ve done the same thing this week, just with players projected to underperform their 2010 wOBAs. This doesn’t exactly make them busts, and so the title of this piece is slightly misleading. I simply can’t think of the antonym of sleeper. I suppose “2011 AL East Players Projected to Underperform their 2010 wOBAs” would be far more accurate, but that’s a tad wordy for my liking. Today we’re examining the Orioles and the Red Sox, and tomorrow will be the Yankees, Rays and Blue Jays.

Baltimore Orioles: Luke Scott

2010 wOBA of .387. 2011 projected wOBA of .359

For many Luke Scott came out of nowhere in 2010 when he posted a batting line of .284/.368/.535 with a .387 wOBA in 517 plate appearances. The burly first baseman has always shown the ability to hit for power, both in the minors and the majors, but this was the first time he was able to put it all together for an entire season since he was traded from Houston to Baltimore after the 2007 season. While Scott did hit for a lot of power in 2010, he also showed improvement in his batting average and on-base percentage. Both increased exactly 28 points from 2010. However, this likely attributable to an increased in batted ball fortune, given that his BABIP went up 21 points. Indeed, his approach at the plate in 2010 appeared remarkably similar to what he did in 2009. His walk rate increased only a half a percent, and he dropped his strikeout rate only 1.3%.

Even though Baltimore’s lineup looks to be slightly better in 2011, even though one could make the case that they’re doing themselves no long-term favor by signing Vladimir Guerrero and Derrek Lee when they can’t reasonably expect to contend this year, PECOTA sees a fair amount of regression in store for Luke Scott this year. It predicts a batting line of .262/.345/.474 with a .359 wOBA, a decrease of .028 in wOBA. It also sees his BABIP falling back down to .290, despite a career BABIP of .300 and a .304 mark in 2011. All told, PECOTA’s projection for 2011 sees Scott showing less power than he did in 2010 or 2009 and showing roughly similar abilities to hit for average and get on base.

Scott gave back some of his fWAR value at the plate last year by spending some time at 1B (all the warnings about fielding metrics and small samples apply), but this year he’ll spend time in left field as Lee takes over at 1B and Guerrero at DH. Scott generally grades out as a decent defender in left, so he still ought have moderately good overall value for the Orioles in 2011. PECOTA just doesn’t like his chances of having as much offensive thump as last year.

Boston Red Sox: Jed Lowrie

2010 wOBA of .393. 2011 projected wOBA of .331

Last week I picked Jacoby Ellsbury as a sleeper, but noted that his inclusion on the list was more a function of an incredibly low 2010 baseline, one created largely by injuries rather than a dip in skill. As a result, while Ellsbury was projected to see a drastic improvement over his 2010 line in 2011 it didn’t mean that his projection was at all robust. Jed Lowrie is the exact flipside of the coin. In 2011 he’s projected to post a far lower wOBA than he did in 2010, but this tells you more about his insane 2010 performance than it does about his 2011 projection. He still represents a good middle infield option for the Red Sox.

A year removed from wrist injury, Lowrie had less than a half season of plate appearances (197) with Boston in 2010, but really went out of his way to make them count. After a relatively normal July Lowrie went on a tear for the rest of the season (ending in early October, of course), hitting .293/.385/.544 and leaving him with a gaudy .393 wOBA for the year. This mark was higher than any 2B in baseball, including Cano, and was second only to Troy Tulowitzki’s .408 mark for shortstops. There are no easy culprits to explain away this performance: his BABIP was entirely normal and his HR/FB ratio, while higher than his career average, was still only 11.6%.

One less obvious explanation for his power surge might be the quality of pitchers faced: his 9 home runs in 2010 came off Brad Mills, Tommy Hunter, Casey Janssen, Brian Matusz, Luke French (2), Andy Pettitte, Dustin Moseley and Joba Chamberlain (2). It’s not indicative of anything prima facie, good hitters beat up bad pitchers, but late season surges in performance can sometimes be explained by a deterioration of the quality of opposition due to injury attrition or the presence of September call-ups.

In 2011 PECOTA sees Lowrie hitting .245/.338/.401, good for a .739 OPS and a .331 wOBA. Marcel’s projection is similarly conservative (.336 wOBA), but this is the result of the fact that Marcel only uses the past three years of data and doesn’t include minor league performance. Obviously the systems are showing a fair bit of reticence to overvalue his 2010 performance, in light of the relatively pedestrian 382 plate appearances in 2008 and 2009. There is, however, considerable upside. While he is 26 years old already, Lowrie was still a first-round pick in 2004 and boasts an impressive minor league pedigree. When you combine that with past struggles and an injury history that would make Nick Johnson proud, it’s hard to know what to expect from Lowrie in 2011. This was exactly Patrick Sullivan’s point when he did a mini-preview of Lowrie back in January over at Red Sox Beacon:

Anyone who tells you they have a beat on Jed Lowrie and his prospects for 2011 is speculating. He has an encouraging Minor League track record, a choppy Major League one and he hasn’t been able to stay healthy long enough to get a sense for what type of player he ultimately will be. But I also think it’s worth trying to find significance in his 2010 standout season. I know all small sample warnings apply, but he did hit .287/.381/.526 in just under 200 plate appearances. Here’s the list of middle infielders who have managed a single-season 139 OPS+ or better in 175 PA’s or more since 2000: Alex Rodriguez, Jeff Kent, Nomar Garciaparra, Bret Boone, Roberto Alomar, Ben Zobrist, Hanley Ramirez, Edgardo Alfonzo, Chase Utley, Rich Aurilia, Robinson Cano and Carlos Guillen.

And that’s it. I know the Red Sox can’t depend too much on him until he shows an ability to stay on the field. But at the same time, they need to prioritize getting Lowrie the requisite playing time to figure out his value, either for them to retain or trade given the looming presence of Jose Iglesias. There’s a chance that Lowrie could put up some superstar seasons if given the opportunity.

I’m not as enthused as Sullivan is about this list. While there are certainly some serious heavy hitters, there are also some apparent flukes. Aurilia posted one season of 142 OPS+ in 2001 but was a 91 OPS+ hitter from then on and a 99 OPS+ hitter for his entire career. Edgardo Alfonzo and to an extent Carlos Guillen and Ben Zobrist, appear to be similar outliers, and if you drop the OPS+ requirement down from 139 to 135 you pick up a even wider swath of interlopers: Jhonny Peralta, Marcus Giles, Jose Hernandez and Mark Loretta. Again, none of these players ever produced an OPS+ of over 135 again in their career. This doesn’t really tell us a whole lot about Lowrie though, so ultimately Sullivan’s conclusion about Lowrie is spot-on: the best we can do is speculate about what Lowrie can do in 2011. He’s a talented player with a bad injury history and a murky positional place on the club. He could take over for Scutaro and perform solidly or spend most of the season on the disabled list, and neither result would be a great surprise.