JULY 16, 2021 — New York shortstop Francisco Lindor and Oakland third baseman Matt Chapman are in the top spots in their respective leagues after the first half of the 2021 Major League Baseball season in the most recent SABR Defensive Index™ rankings.
The SDI draws on and aggregates two types of existing defensive metrics: those derived from batted ball location-based data and those collected from play-by-play accounts. SDI utilizes MLBAM’s Statcast, Sports Information Solutions data, and STATS, LLC data as well as traditional statistics with advanced analysis.
The SABR Defensive Index accounts for approximately 25 percent of the Rawlings Gold Glove Award selection process that will be added to the votes from the managers and coaches.
Lindor’s SDI of 6.3 is the highest in the NL among all qualified defenders, just ahead of Colorado third baseman Joshua Fuentes (6.1). Rounding out the top five are San Diego third baseman Manny Machado, Pittsburgh catcher Jacob Stallings, and Miami right fielder Adam Duvall, all at 4.7.
Chapman’s SDI of 6.5 leads all fielders in the AL, followed by Texas right fielder Joey Gallo (6.0), Tampa Bay center fielder Brett Phillips (5.0), Chicago pitcher Dallas Keuchel (5.0), and Toronto second baseman Marcus Semien (4.8).
The updated SDI results were released today by the Society for American Baseball Research.
The final SDI results will be released following the conclusion of the 2021 season at SABR.org. The SDI is compiled by the SABR Defensive Committee, which includes former SABR Board President Vince Gennaro; Sean Forman of Baseball-Reference.com; Ben Jedlovec, MLB’s Director of Engineering, Data Quality; SABR Director F.X. Flinn; author and defensive metrics expert Chris Dial; and author Michael Humphreys.
Here are the top 25 players in each League, through games of July 11, 2021:
|Michael A. Taylor||KCR||CF||4.5|
|Jackie Bradley Jr.||MIL||CF||2.8|
The Society for American Baseball Research (SABR) is a nonprofit organization dedicated to fostering research and disseminating the history and record of baseball. Founded in 1971, SABR has more than 6,000 members worldwide and has established itself as a vibrant baseball community and a premier distributor of ground-breaking baseball information. SABR features more than 80 regional chapters and more than 30 research committees, and produces three annual publications — two editions of The Baseball Research Journal and The National Pastime — in addition to other print and e-books. SABR also hosts two annual events: the National Convention each summer and the SABR Analytics Conference in March in Phoenix. For more information about SABR, visit SABR.org.
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Originally published: July 16, 2021. Last Updated: July 15, 2021.