Archive for Meta Analysis

Over the past few days, Eno Sarris has been rolling out our consensus ranking for players at various positions. To create my rankings I used ZiPS rest of season stats to compile my rankings. The only time I changed my ranking was because of expected time lost on the D.L. For some players who are having a good 2012 season (Josh Reddick, Jed Lowrie, Allen Craig, Edwin Encarnacion and Trevor Plouffe), my rankings are lower than most people expected. Today, I am going to look at one cause for a player to be out performing his projections: injuries.

Note: I will be looking at lack of past playing time and a measurable change in talent for the other two causes for a player out performing there projections.

Injuries and how they relate to player performance are one of the few last few frontiers in sabermetric studies. This off season, in two separate studies, Mitchel Litchman (MGL) and myself looked at how injuries affect a hitter’s performance. In MGL’s study, he looked at players who went on the DL and how they performed. He found that hitters under performed their SLG in the year of the injury, but the rest of their traits stayed constant. In my study, I looked at players who played through injuries without going on the D.L. and found the same conclusion. In the year after the injury, the player exceeded their projected power numbers.

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Here is a look at some data for Jurrjens and Oswalt, who both returned to the majors last Friday night.

(Ownership rates are ESPN and then Yahoo!)

Jair Jurrjens (11%, 21%) – Jurrjens started the season in the Braves rotation, but was sent down to the minors after 4 starts and a 9.37 ERA. While in AAA, he made 10 starts and struggled with 5.18 ERA, 4.7 K/9 and a 1.43 WHIP. Due to injuries with other Braves starting pitchers, he was forced back into their rotation. On Friday night, he had a good outing with 4 K, 1 BB, 1 HBP, 3 H and only 1 Run.

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How’s that for a nerdy title. At least you know what you’re going to get. Using slash12’s updated xBABIP formula outlined by Jeff Zimmerman yesterday (with the 2009-2011 constants in place), we can look at players that ‘should’ be showing better BABIPs than they are right now. Since the constants in the formula change a little from year to year, let’s use the list as a general guide to batted ball luck instead of a specific prescription for doom or boon for each player.

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A few days ago, I looked at the effects the shift may be having on players using the difference between their BABIP and xBABIP. The observed drop in a player’s BABIP, compared to their xBABIP, was 41 points. As reader phoenix2042 pointed out, I was using a dated formula for xBABIP. By using an updated xBABIP formula, I still found a difference, but not as much of one.

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It seems that the newest “Moneyball” craze in the majors this season is the defensive shift. Usually used only against left handed hitters, it is being implemented by more and more teams against more and more players. Today, I am going to look at the fantasy implications of the shift.

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Omar Infante is possibly having the most productive season of his career. He is currently hitting 0.321/0.352/0.532 with 6 HRs. While it may be tough for him to hit 16 HRs like he did in 2004, he is seeing a nice power spike. Have any of his core attributes changed that will help keep this break out sustainable?

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Eric Hosmer has been a huge disappointment this season with a 0.174/0.243/0.316 slash line. Most of his problems stem from a 0.169 BABIP. I am going to look to see if there are any under lying problems for the drop and any possible reasons for optimism.

As I stated previously, Eric has a BABIP of 0.169. It is the lowest value of all hitters with at least 150 PA. In 2011, he was 50th out of 145 qualified hitters with a 0.314 BABIP.

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Last Saturday, I looked at the bottom dwellers in hitter BABIP. In a surprise move, one of those hitters, Adam Lind, was actualy sent down to Triple-A. Today we will look at the BABIP leaders. These are your potential trade candidates, but I’ll look more in depth into the interesting names.

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Even though we are over a month into the season, a hitter’s BABIP and resulting batting average are still rather meaningless. In fact, neither statistic stabilizes within 550 plate appearances. That means that it has little predictive value at this point and should have limited weight when evaluating a player now. Therefore, hitters with extremely high or low BABIPs should potentially be looked at as trade bait or acquisition targets, respectively. Let’s first look at the possible targets, or those with abnormally low BABIP marks.

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We are now a full month into the season, so it’s finally time to give you all an update on the LABR mixed league you have all been eagerly awaiting. For those who did not commit my team to memory, refresh it by checking out my draft results again. Once you have stopped laughing after perusing my roster, you will realize how brave I am to ever talk about this team again.

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