Baseball Think Factory, abbreviated as BTF or BBTF, was a sabermetrically-oriented baseball web site which featured daily news stories in baseball, with original content contributed by SABR members such as Dan Szymborski. The site was previously branded as Baseball Primer, and was created in 2001 by the founders of Baseball-Reference. Contributors who have gone on to work for Major League Baseball front offices include Voros McCracken, [1] Carlos Gomez, [2] and Tom Tango. Bill James' Baseball Abstract books published in the 1980s are widely considered to be the modern predecessor to websites using sabermetrics such as baseballthinkfactory and baseballprospectus. [3]
Baseball Think Factory shut down on December 15, 2023. A site for “refugees” of BBTF was established at https://hallofmerit.boards.net/
The site was founded in 2001 by Jim Furtado and Sean Forman of Baseball-Reference under the name "Baseball Primer," with a matching URL of (http://www.baseballprimer.com/). It lasted until Furtado shut it down December 15, 2023.
The site's emphasis on sabermetric baseball analysis attracted members of the rec.sport.baseball Usenet groups, and later drew readers of Rob Neyer's ESPN columns. The early site cultivated spirited discussions as a result of the Usenet veterans' familiarity with each other and the fact that registration was not required to post comments. The site also featured a number of original research articles.
In 2004, the site was re-branded as "Baseball Think Factory" and was re-built on a different software platform in order to support the growing user population and accommodate user registration and content management features.
BTF mainly hosted baseball discussions. Sports Illustrated magazine listed the site as an "essential baseball destination," characterizing it as offering "links to significant baseball articles, accompanied by freewheeling, usually informed discussion threads." [4] Michael Lewis also mentioned the site (as baseballprimer) in his book Moneyball. [5] [6]
The site featured a number of sections with content for different audiences. These include:
BTF has featured numerous original research articles, primarily under the aforementioned sub-sites "Transaction Oracle," "Dialed In," and "Primate Studies." Several analysts such as Mitchel Lichtman and Tom Tango regularly posted original research articles and participated on discussion and criticism of the work at BTF before going on to establish their own sites and to publish results in book form. [10]
Given that statistics characterizing major league offense (batting) are fairly well established, much of the research posted on BTF spotlight defense (fielding) in the form of statistics more accurate than traditional fielding statistics. Examples include:
Litchman created fielding metrics that use play-by-play records that record the location of individual batted balls. Litchman combines this play-by-play data with his linear-weights system that assigns run values to the various baseball plays and their context within the game (inning, runners on base, score, etc.) Some of his initial articles on the system were posted on BTF. [11] [12]
Lichtman's Ultimate zone ratings (UZR) statistics can now be found on the baseball website Fangraphs.
Szymborski posts updates from his forecasting system known as "ZiPS" under his sub-site Transaction Oracle. [13] ZiPS results are also used in his articles evaluating Major League Baseball transactions. These projections can also be found on Fangraphs, updated for in-season projections.
Dial is a SABR member who contributes articles to BTF, many focusing on statistics measuring defense. Dial has studied STATS, Inc.'s "zone rating" for years and posts updated statistics based on this data and on Retrosheet data. Some of Dial's more notable articles include:
Gomez is a former college and professional pitcher [17] who contributed articles featuring detailed, frame-by-frame analyses of pitcher mechanics. Prior to their publication, the average fan had little access to detailed evaluations of pitchers' mechanics and had to rely on short descriptions gleaned by beat reporters from scouting reports. The Arizona Diamondbacks organization offered him a position as a scout in 2007. [2]
Baseball statistics refers to a variety of metrics used to evaluate player and team performance in the game of baseball.
In sports analytics, sabermetrics is the empirical analysis of baseball, especially baseball statistics that measure in-game activity. Sabermetricians collect and summarize the relevant data from this in-game activity to answer specific questions. The term is derived from the acronym SABR, which stands for the Society for American Baseball Research, founded in 1971. The term "sabermetrics" was coined by Bill James, who is one of its pioneers and is often considered its most prominent advocate and public face.
George William James is an American baseball writer, historian, and statistician whose work has been widely influential. Since 1977, James has written more than two dozen books about baseball history and statistics. His approach, which he named sabermetrics after the Society for American Baseball Research (SABR), scientifically analyzes and studies baseball, often through the use of statistical data, in an attempt to determine why teams win and lose.
The Society for American Baseball Research (SABR) is a membership organization dedicated to fostering the research and dissemination of the history and record of baseball, primarily through the use of statistics. The organization was founded in Cooperstown, New York, on August 10, 1971, at a meeting of 16 “statistorians” coordinated by sportswriter Bob Davids. The organization now reports a membership of over 7,500 and is based in Phoenix, Arizona.
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In baseball, fielding independent pitching (FIP) is intended to measure a pitcher's effectiveness based only on statistics that do not involve fielders. These include home runs allowed, strikeouts, hit batters, walks, and, more recently, fly ball percentage, ground ball percentage, and line drive percentage. By focusing on these statistics and ignoring what happens once a ball is put in play, which – on most plays – the pitcher has little control over, DIPS claims to offer a clearer picture of the pitcher's true ability.
Baseball Prospectus (BP) is an organization that publishes a website, BaseballProspectus.com, devoted to the sabermetric analysis of baseball. BP has a staff of regular columnists and provides advanced statistics as well as player and team performance projections on the site. Since 1996 the BP staff has also published a Baseball Prospectus annual as well as several other books devoted to baseball analysis and history.
Paul DePodesta is an American football executive and former baseball executive who is the chief strategy officer of the Cleveland Browns of the National Football League (NFL). He previously served as a front-office assistant for the Cleveland Indians, Oakland Athletics, and New York Mets of Major League Baseball (MLB). DePodesta was also general manager of MLB's Los Angeles Dodgers. He is also known for his appearance in the book and movie Moneyball about his early career as an assistant with the Athletics.
Sean Lahman is an author and journalist. He is currently a reporter for the USA Today Network and Rochester Democrat and Chronicle and frequently makes public appearances to speak about database journalism, data mining and open-source databases.
Tom Tango and "TangoTiger" are aliases used online by a baseball sabermetrics and ice hockey statistics analyst. He runs the Tango on Baseball sabermetrics website and is also a contributor to ESPN's baseball blog TMI . Tango is currently the Senior Database Architect of Stats for MLB Advanced Media.
Bret Randolph Prinz is a former Major League Baseball relief pitcher who played with the Arizona Diamondbacks (2001–2003), New York Yankees (2003–2004), Los Angeles Angels of Anaheim (2005), and Chicago White Sox (2007). He batted and threw right-handed.
The Neyer/James Guide to Pitchers (ISBN 0-7432-6158-5) is a non-fiction baseball reference book, written by Rob Neyer and Bill James and published by Simon & Schuster in June 2004. In the text on its dust jacket, it bills itself as a "comprehensive guide" to "pitchers, the pitches they throw, and how they throw them".
Baseball-Reference is a website providing baseball statistics for every player in Major League Baseball history. The site is often used by major media organizations and baseball broadcasters as a source for statistics. It offers a variety of advanced baseball sabermetrics in addition to traditional baseball "counting stats".
Daniel John Szymborski is an American writer of sabermetrics primarily known for his work with baseball projections and minor league translations.
Wins Above Replacement or Wins Above Replacement Player, commonly abbreviated to WAR or WARP, is a non-standardized sabermetric baseball statistic developed to sum up "a player's total contributions to his team". A player's WAR value is claimed to be the number of additional wins his team has achieved above the number of expected team wins if that player were substituted with a replacement-level player: a player who may be added to the team for minimal cost and effort.
Ultimate zone rating (UZR) is a sabermetric statistic used to measure fielding. It compares the event that actually happened (hit/out/error) to data on similarly hit balls in the past to determine how much better or worse the fielder did than the "average" player. UZR divides a baseball field into multiple zones and assigns individual fielders responsibility for those zones.
Sports analytics are collections of relevant historical statistics that can provide a competitive advantage to a team or individual by helping to inform players, coaches and other staff and help facilitate decision-making both during and prior to sporting events. The term "sports analytics" was popularized in mainstream sports culture following the release of the 2011 film Moneyball. In this film, Oakland Athletics general manager Billy Beane relies heavily on the use of baseball analytics to build a competitive team on a minimal budget, building upon and extending the established practice of Sabermetrics.
Benjamin Strong Baumer is a statistician and sabermetrician. He is a professor of statistical and data sciences at Smith College, and was formerly the statistical analyst for the New York Mets.
Sherri Nichols is an American software engineer, data scientist, and baseball statistician most known for her contribution to baseball's Sabermetrics movement. Growing up loving baseball and math, Nichols fused the two passions together to start analyzing baseball in a stats-driven manner. Her influence on the infant stages of the Sabermetrics movement in the 1980s-1990s can be depicted from various works such as Nichols' Law of Catcher Defense, her work collecting play-by-play data, and most notably her cocreation of Defensive Average. Nichols' assertiveness and knowledge has greatly influenced other notable baseball statisticians and paved the way for other women to enter the male dominated industry.
Allan Roth was a Canadian baseball and hockey statistician and an early proponent of sabermetrics in baseball. During his career, Roth worked for the Brooklyn/Los Angeles Dodgers as their official statistician from 1947 to 1964.