Jul
14

A second half search for a little bit of luck

By

As we analyze the Yankees’ season, we often focus on the role luck plays in a baseball game. For those not used to the concept, though, it can be confusing. This isn’t the luck that leads you to find $10 in the washing machine, but it is more akin to the luck that leads you to just catch your train in the morning one second before the doors close. That still doesn’t answer the question what exactly luck is in a baseball context.

For that answer, we can turn to a three-year-old Wall Street Journal article by Russell Adams. In it, the author explores concepts and analysis surrounding luck. Using ample data points from the rich history of baseball, leading analysts both inside baseball’s front offices and outside of them can determine whether a player’s performance is lucky or a sign of a different shift.

Luck can take on a few different forms in baseball. On an individual level, the most obvious example is Batting Average on Balls in Play (BABIP). The average player’s BABIP will generally hover somewhere around .290. A player with a BABIP of .250 may be unlucky; he isn’t hitting them where they ain’t. He also may be popping up more and hitting fewer line drives, both negative factors on the ol’ BABIP. By looking at outcomes and results, statisticians can weed out bad luck from good.

On a team level, luck manifests itself in the form of win-loss records. Generally, history has shown that teams’ records track with their runs scored and runs allowed. This is known as the Pythagorean expectation. Teams that score a lot of runs without allowing as many generally win a lot of games, but one-run games or blowouts — the so-called “random” events — can impact the perception of how good or bad a team actually is. (For more on team-based luck, check out J.C. Bradbury’s take. He has written extensively on the topic.)

This year, the Yankees have, by one measure, been lucky. Based purely on their +60 run differential — they’ve scored 60 more runs than they’ve allowed — they should be 49-39 rather than 51-37. That calculation, however, doesn’t account for various factors, such as strength of schedule, Chien-Ming Wang‘s problems and the early-season blowouts. Another calculation, however, should give comfort to Yankee fans.

Using a complex statistic called base runs that attempts to calculate expected runs scored and expected runs allowed while controlling for strength of schedule, Matthew Carruth at FanGraphs has the luck breakdown of every team in the Majors. In this calculation — one Carruth admits is subjective, as are most complex concepts of team luck — the Yanks have a luck factor of -1 and the Red Sox are at 6. Tampa is at -9. In a perfect world, these would all balance to 0, and the AL would continue to be a three-way race between Tampa, New York and Boston.

(As an aside, a few FanGraphs commenters had some issues with Carruth’s methodology. Take a gander through the feedback there if you’re interested. My point will remain the same.)

So, where does this leave us? Well, as I said, we could take comfort in the luck factor. The Yanks were a bit unlucky and are still the Wild Card leader. Sounds good to me. But Tampa is a dark horse. If their luck evens out and Boston’s does as well, they could jump ahead of the Sox and Yanks in the standings.

In the end, then, we’re left where we started. We can understand the role luck plays in baseball; we can blame it for some of the Yanks’ failings; but we will be subjected to its whims this summer. As the 2009 season hits its second half, the two teams in the AL East who are the luckiest will probably be the ones playing in October while the third will go home.

Categories : Analysis

70 Comments»

  1. Okay, whoring yourself out to the YES Network© Blogging Network™ was one thing, but The New York Lottery? Have you no shame? HAVE YOU NO SHAME?!?!?!??!

    RiverAveBlues = Phillip Tattaglia

  2. KayGee says:

    Are there any statistics on luck in regards to missed calls by umpires (mainly on the bases) and how they could impact a teams record? Or is it assumed that eventually those calls even out by years end?

    • JGS says:

      It’s assumed they even out, but it’s also impossible to really know how the game would have played out had they made the correct call. We like to assume, but we really know nothing

    • RAB poster says:

      I can’t help but think that one game vs. Toronto was stolen by the umps.

      I know “all teams go through this” and “good teams can overcome those types of calls”.

      But I at least am convinced had the calls not been blown, we win that game.

  3. Moshe Mandel says:

    I cannot observe luck with my eyes. Hence it does not exist, and Girardi should be fired.

  4. Salty Buggah says:

    That +6 “luck” for the Red Sox isn’t luck, it’s all GRIT! Half of it comes from that animal on Youkilis’ chin.

  5. RAB poster says:

    Why does this matter? In the end, I know nothing more than before-if we win games, we win the division.

    Fascinating.

  6. Sweet Dick Willie says:

    Is it just me, or does that guy look like Pedroia?

  7. Little Bill says:

    I understand luck and variance, but not many others wanted to hear it during the Yankees mini slump in early June. “I don’t want to hear That’s baseball blah blah blah.” These people were convinced that the team was as bad as the Nationals and that they’d quickly collapse. This is a good post to explain to these people that sometimes the the results just don’t happen because of variance and luck.

    • V says:

      Link? Or are you pretending to be oh so much cooler than everybody else, yet again, because your life is JUST that sad?

      • Bo says:

        Always the class act, V. You ever comment without insulting someone?

      • Little Bill says:

        Just do an RAB search for “variance.” Anybody that has been here a while knows that I have been at the forefront of this critical issue. I’ve defended guys like A-Rod, Tex, Cano, and Matsui who some people wrote off when they went through slumps. Bad streaks are going to happen to every player, but with good players like those mentioned it has a way of balancing itself out.

    • Salty Buggah says:

      Yes, Little Bill knew everything…

  8. Bo says:

    Luck? How about pitching and hitting better. That will help this “luck” thing out.

  9. Baseball is the most superstitious sport of them all.

    Why wouldn’t luck be a part of it?

  10. Jefe says:

    Blame Wang for the first half.

    If hes even just average this team has probably 60 wins right now.

    If thats luck so be it

  11. JimT says:

    Ben, You are Brian Cashman’s PR man come true. Spend a ton on money, put together a flawed team and unproductive farm system and then have someone put together a stats oriented argumnet that its all “bad luck”. A dream come true.

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