CSS Button No Image Css3Menu.com

Baseball Prospectus home
  
  
Click here to log in Click here for forgotten password Click here to subscribe

World Series time! Enjoy Premium-level access to most features through the end of the Series!

<< Previous Article
Premium Article Prospectus Matchups: J... (01/25)
<< Previous Column
Premium Article Prospectus Today: Swap... (01/19)
Next Column >>
Premium Article Prospectus Today: The ... (01/31)
Next Article >>
Prospectus Triple Play... (01/27)

January 26, 2005

Prospectus Today

Fun with PECOTA

by Joe Sheehan

the archives are now free.

All Baseball Prospectus Premium and Fantasy articles more than a year old are now free as a thank you to the entire Internet for making our work possible.

Not a subscriber? Get exclusive content like this delivered hot to your inbox every weekday. Click here for more information on Baseball Prospectus subscriptions or use the buttons to the right to subscribe and get instant access to the best baseball content on the web.

Subscribe for $4.95 per month
Recurring subscription - cancel anytime.


a 33% savings over the monthly price!

Purchase a $39.95 gift subscription
a 33% savings over the monthly price!

Already a subscriber? Click here and use the blue login bar to log in.

Yesterday, we released the 2005 PECOTA projections, which can be downloaded here. PECOTA is Nate Silver's projection system, one which enhances accuracy by using not just regressions and past performance, but player characteristics such as height and weight, as well as advanced indicators such as contact rate and power relative to age and other factors. You can read more about PECOTA here.

I like to have some fun with these when they come out. For instance, here's what PECOTA thinks the home-run leaderboards will look like at the end of the year:


National League            American League

Albert Pujols, 39          Alex Rodriguez, 36
Jim Thome, 36              Manny Ramirez, 33
Adam Dunn, 35              Mark Teixeira, 33
Jim Edmonds, 31            Eric Chavez, 32
Andruw Jones, 30           Alfonso Soriano, 32
                           David Ortiz, 32
As you can see, PECOTA projects no one in MLB to reach 40 home runs this year. Where is Barry Bonds, you ask? PECOTA has a unique Bonds projection, figuring him to be the best player in baseball--posting a VORP of 88.1--while not qualifying for the batting title. This is reasonable, because 40-year-olds usually see their playing time diminish, but may be a tad pessimistic when it comes to Bonds, who would have to suffer a major injury to not qualify for rate stats' titles. Bonds is projected to lead MLB in batting average, OBP and slugging average if he can get to 502 plate appearances.

Bonds' full projection:


 AB   H  2B  3B  HR   BB  K  SB CS   AVG  OBP  SLG  VORP    Defense
330 112  24   1  29  135 43   2  0  .339 .532 .687  88.1  112-LF -3

Behind Bonds on the list of the best players in baseball are Albert Pujols, Vladimir Guerrero and Alex Rodriguez. PECOTA loves Pujols like I love chocolate: he sits just behind Bonds with a projected VORP of 83.7, and no one else is within 20 points of VORP. Put a different way, PECOTA expects Bonds and Pujols to be two wins better than everyone else in baseball. That's dominance.

The projected VORP leaderboards:


National League            American League

Barry Bonds, 88.1          Vladimir Guerrero, 60.4
Albert Pujols, 83.7        Alex Rodriguez, 60.3
Bobby Abreu, 54.8          Manny Ramirez, 55.5
Jim Edmonds, 54.0          Miguel Tejada, 50.6
Todd Helton, 52.7          Gary Sheffield, 49.9
Of course, any projection system will probably conclude that Barry Bonds is good and that Guerrero and Rodriguez are the class of the American League. One of the best features of PECOTA is that it tags players with "Breakout" scores, expressed as a percentage. From the BP statistical glossary:
Breakout Rate is the percent chance that a hitter's EQR/PA or a pitcher's PERA will improve by at least 20% relative to the weighted average of his EQR/PA in his three previous seasons of performance. High breakout rates are indicative of upside risk.

Breakout rates measure change relative to a player's previously-established level of performance. For this reason, a high Breakout score can create a falsely optimistic picture for a player who has a very poor performance record. It is far easier for a player with a baseline of 40 EQR per season to improve upon that figure by 20% than it is for a player with a baseline of 100 EQR per season; as a result, his Breakout score is likely to be higher.

Some of the most notable breakout figures in this year's projections belong to PECOTA favorites--and teammates--Adam Dunn and Wily Mo Pena. PECOTA sees Dunn improving on last year's performance, jumping to .270/.395/.562 with 35 home runs. Pena, whose '04 projection was one of the biggest wins for the system, is pegged at .281/.351/.528, with 21 home runs in just 340 at-bats.

Other high-breakout players include Jonny Gomes (.265/.366/.491, 272 AB), Troy Glaus (.281/.391/.579, 345 AB) and Hee Seop Choi (.258/.374/.493, 329 AB). PECOTA's playing-time projections are very conservative; it's likely that if Gomes and Choi play this well, they would play more than indicated. Glaus' projection, of course, is held down by his recent injury-shortened seasons.

PECOTA also projects the likelihood of a player falling back from his established level, a metric called Collapse rate. Some of the highest Collapse rates belong to Ichiro Suzuki, Jose Reyes, Cesar Izturis and Mark Loretta.

What about the guys on the mound? As with the hitters, PECOTA projects the usual suspects to be among the game's best pitchers, and is extremely conservative with projecting playing time. For example, Mark Prior, Kerry Wood and Jake Peavy are all projected to fall short of the 162 innings necessary to qualify for the ERA title. Among the players who are expected to reach that cutoff, PECOTA likes the following:


National League            American League

Pedro Martinez, 2.93       Johan Santana, 3.11
Jason Schmidt, 2.98        Randy Johnson, 3.14
Ben Sheets, 3.22           Curt Schilling, 3.70
Carlos Zambrano, 3.51      Roy Halladay, 3.94
Tim Hudson, 3.65           Matt Clement, 3.95
Breakouts and collapses work the same for pitchers as they do for hitters, but because of the sample sizes for relievers and other factors, they tend to dominate the list. Eric Gagne has one of the highest breakout rates in the game, and he heads a list of comparable power bullpen arms. Among starters, PECOTA sees the Cubs' Prior and Carlos Zambrano as having big breakout chances.

Collapse lists are also dominated by relievers, notably Trevor Hoffman and Mariano Rivera. Among starters, Andy Pettitte and David Wells have high collapse probabilities.

Joe Sheehan is an author of Baseball Prospectus. 
Click here to see Joe's other articles. You can contact Joe by clicking here

Related Content:  Breakout,  PECOTA,  Leaderboards

0 comments have been left for this article.

<< Previous Article
Premium Article Prospectus Matchups: J... (01/25)
<< Previous Column
Premium Article Prospectus Today: Swap... (01/19)
Next Column >>
Premium Article Prospectus Today: The ... (01/31)
Next Article >>
Prospectus Triple Play... (01/27)

RECENTLY AT BASEBALL PROSPECTUS
Moonshot: The Royals, the Strike Zone, and a...
Playoff Prospectus: The Other Royals: World ...
Minor League Update: Games of Wednesday, Oct...
Fantasy Freestyle: Playoff Spotlight: Brando...
The Lineup Card: Nine Unlikely Postseason He...
Daisy Cutter: Cain's Overlooked Arrival
Playoff Prospectus: Royals Spit Hot Fire: Wo...


MORE BY JOE SHEEHAN
2005-02-04 - Premium Article Prospectus Today: Looking Mournfully at the ...
2005-02-02 - Premium Article Prospectus Today: Sammy!
2005-01-31 - Premium Article Prospectus Today: The Sabermetric Challenge
2005-01-26 - Premium Article Prospectus Today: Fun with PECOTA
2005-01-19 - Premium Article Prospectus Today: Swapping Numbers
2005-01-18 - Premium Article Prospectus Today: The Testing Agreement
2005-01-13 - Premium Article Prospectus Today: Still Searching
More...

MORE PROSPECTUS TODAY
2005-02-04 - Premium Article Prospectus Today: Looking Mournfully at the ...
2005-02-02 - Premium Article Prospectus Today: Sammy!
2005-01-31 - Premium Article Prospectus Today: The Sabermetric Challenge
2005-01-26 - Premium Article Prospectus Today: Fun with PECOTA
2005-01-19 - Premium Article Prospectus Today: Swapping Numbers
2005-01-18 - Premium Article Prospectus Today: The Testing Agreement
2005-01-13 - Premium Article Prospectus Today: Still Searching
More...

INCOMING ARTICLE LINKS
2005-01-28 - Premium Article Prospectus Matchups: The Other Side of the P...