The various projection systems are the closest we can come
to predicting future. I was thinking of what they currently lack, and the first
thing that came to mind was pitchers as batters. I then checked how each team
did with their pitchers last season. It turns out that the spread from the best
team, the Dodgers, to the worst team, the Pirates, is less than three wins. The
true talent level is much narrower than that, and there does not seem to be
much advantage gained by including pitcher batting in projections. Instead, I
decided to look at the history of pitchers as position players.
Friday, March 7, 2014
Thursday, March 6, 2014
Brett Gardner and Positional Adjustment: CF vs COF
Brett Gardner is the typical center fielder, with speed and
range in the field. The New York Yankees just signed him for a four-year
extension of 52 million dollars, but to play left field alongside Jacoby
Ellsbury instead of center field. There are concerns that Gardner’s bat may not
play in a corner outfield spot, that his value would be lower at LF than at CF.
This is the effect of the positional adjustment. As a player’s fielding contribution
is compared to other players of the same position, we have to adjust our
evaluation of a player based on where he plays in the field. The established
positional adjustment has a CF getting a boost of +2.5 runs over a full season
while a LF or RF gets a penalty of -7.5 runs. In theory, a CF moving to LF
would gain 10 runs in the field to make up the difference, as they are now
compared to worse fielders. I will be testing whether this statement holds true
in reality.
Predicting LOB%
In my article last week, I developed xLOB% as a descriptive
statistic to estimate a pitcher’s LOB%. In this article, I will attempt to
predict LOB% of a pitcher using his statistics from the previous season.
Despite its fairly weak predictive results, pLOB% explains 12.7% of the
variation in a pitcher’s LOB% in the following season, better than Steamer’s
projection and kLOB%.
Saturday, February 15, 2014
Estimating LOB%
Luck has
been the explanation whenever a pitcher has a significantly lower ERA than his
FIP. There are two statistics where luck plays a huge role, BABIP and LOB%.
Using Steve Staude’s pitching stat correlation tool, we can see that BABIP only
has a correlation of 0.156 from one season to the next, while LOB% has a
correlation of 0.205, for pitchers with a minimum of 30 innings pitched from
2007 to 2013. These numbers are much lower than the correlation of K% or BB%,
suggesting that a large portion of BABIP and LOB% are subject to random
variation and independent of a pitcher’s skill. However, the correlation is not
0. They are not completely random, and a pitcher can still play a small role in
controlling their BABIP and LOB%. Many writers, including Steve, have tackled
the issue of BABIP using batted ball data. In this article, I will be
estimating a pitcher’s LOB% for the current season. This is not supposed to be
a predictive stat, but a descriptive one. Think of it as FIP. While FIP
estimates the pitcher’s ERA using strikeouts, walks and homeruns, xLOB%
estimates the pitcher’s LOB% given his other pitching statistics for the same
season. I will be introducing pLOB% in the next article, which attempts to
project LOB% of a pitcher for the following season.
Tuesday, January 21, 2014
Random Thoughts from Georgetown-Marquette
(Small sample size caveat: This is the second time I have watched a Georgetown game this season)
Let me run through the last minute of regulation, with Georgetown up by four with the ball:
Let me run through the last minute of regulation, with Georgetown up by four with the ball:
Sunday, December 8, 2013
The Value of a Compensation Draft Pick
If the
magnitude of deals for free agents like Robinson Cano and Jacoby Ellsbury
already seem too high to you, the market rate might be even higher than you see
on the surface. Both Cano and Ellsbury were signed with draft pick compensation
attached. If MLB teams are evaluating the draft picks accurately, the valuation
of Cano and Ellsbury are even higher than just their contracts on surface. How
much should the draft picks discount these contracts? To answer the question,
we have to determine how much the draft picks are worth by themselves.
Thursday, October 3, 2013
Predictions for 2013 NBA playoffs
OKC 4-1 HOU (4-2)
SAS 4-1 LAL (4-0)
DEN 4-2 GSW (2-4)
MEM 4-3 LAC (4-2)
MIA 4-0 MIL (4-0)
NYK 4-3 BOS (4-2)
IND 4-1 ATL (4-2)
CHI 4-2 BKN (4-3)
MEM 4-2 OKC (4-1)
SAS 4-2 GSW (4-2)
MIA 4-1 CHI (4-1)
IND 4-2 NYK (4-2)
SAS 4-3 MEM (4-0)
MIA 4-2 IND (4-3)
MIA 4-2 SAS (4-3)
SAS 4-1 LAL (4-0)
DEN 4-2 GSW (2-4)
MEM 4-3 LAC (4-2)
MIA 4-0 MIL (4-0)
NYK 4-3 BOS (4-2)
IND 4-1 ATL (4-2)
CHI 4-2 BKN (4-3)
MEM 4-2 OKC (4-1)
SAS 4-2 GSW (4-2)
MIA 4-1 CHI (4-1)
IND 4-2 NYK (4-2)
SAS 4-3 MEM (4-0)
MIA 4-2 IND (4-3)
MIA 4-2 SAS (4-3)
Wednesday, July 10, 2013
Giving Up Too Much for Igoudala
The Golden State Warriors have decided that Andre Iguodala (48
million dollars over 4 years) is worth the assets it has to give up to dump the
contracts of Andris Biedrins, Richard Jefferson and Brandon Rush on the Utah
Jazz, namely two first round picks, including one in the coveted 2014 draft.
However, the Warriors are likely as far from contention as they are from the
lottery, and that is not a point where the team should be trading the future for
the present.
Saturday, July 6, 2013
Clippers Shore Up, but Questions Remain
The Los Angeles Clippers have used their most valuable chip
in Eric Bledsoe to acquire two wing players they desperately need, Jared Dudley
from the Phoenix Suns and J.J. Reddick via sign-and-trade. They also give up
Caron Butler’s expiring contract to the Suns in the process. The Milwaukie
Bucks will pick up two second-rounders in the trade, but the focus should be on
the Clippers side. Dudley and Reddick solve one of the Clippers’ wing
positions, but the other remains in doubt unless Matt Barnes re-signs far below
his market value.
Wednesday, July 3, 2013
A Minimal Upgrade at Minimal Cost
Let the trade rumors begin to fly! The first significant trade of the season has occurred, as the Baltimore Orioles acquire Scott Feldman and Steve Clevenger from the Chicago Cubs for Pedro Strop, Jake Arrieta and international bonus slots.
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