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John Dewan's Stat of the Week

 

Instant Replay

September 02, 2014

Before 2014, instant replays in baseball were restricted to disputed home runs, fair vs. foul, fan interference, and wall border calls. This season, the scope of replay expanded greatly with the introduction of a challenge system similar to the one in the NFL. Now, it’s possible for managers to challenge practically everything short of ball-and-strike calls, and they have taken advantage.

Between 2008 and 2013, the six years of the original replay system, only 384 replays were used and only 129 plays were overturned according to data collected by Baseball Info Solutions. With still a month to go this season, 1,056 replays have been used and 495 plays overturned. We are on pace for about 600 corrected calls that would previously have been missed.

Overall, replays are overturning calls at a higher rate than the previous system, but not all types of challenges have been equally successful.

Replay Type Total Overturned Rate
Tag Play 431 180 42%
Force Play 430 237 55%
Boundary Call (Over Fence) 67 18 27%
Hit by Pitch 43 21 49%
Fair or Foul 42 14 33%
Trap or Catch 26 21 81%
Record Keeping 10 2 20%
Missed Base 6 2 33%
Passed Runner 1 0 0%
Total 1,056 495 47%

 

More than 80 percent all of replays have been on either disputed tags or force outs, and they have collectively been close to a 50/50 proposition. Replay has overturned 417 of those 861 calls (48 percent).

Other types of replays have been far less common, but, even with limited sample sizes, a pattern emerges. For example, 21 of the 26 replays on trap or catch plays have been overturned (81 percent). In contrast, only 18 of the 67 boundary call situations—which include potential home runs, potential ground-rule doubles and fan interference plays—were overturned, only 27 percent.

The Instant Replay section of the Bill James Handbook 2015 will be expanded from last year's edition to capture the increase in scope of replays. The book is available for pre-order here.


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 TitlePublished Date
Edit Instant Replay Sep 02 2014
Edit Top Defensive Players for 2014 Aug 20 2014
Edit Who Are The 2014 MVP Candidates? Aug 08 2014
Edit How Do Shifts Affect League-Wide Batting Averages? Jul 25 2014
Edit The Best and Worst Baserunners in 2014 Jul 18 2014
Edit The White Sox Blow Another Lead Jul 10 2014
Edit Shifts Against Right-Handed Hitters Jun 26 2014
Edit Cannon Arms in 2014 Jun 10 2014
Edit The Most Improved Defensive Teams Jun 06 2014
Edit How Many More No-Hitters This Year? May 29 2014
Edit Rookie of the Year – Tanaka or Abreu? May 16 2014
Edit Can the National League Reverse a 10-Year Trend? May 09 2014
Edit Who Are the Best and Worst Defensive Teams So Far? Apr 25 2014
Edit Shifts Still on the Rise Apr 18 2014
Edit Can the First 10 Games Predict Playoff Chances? Apr 11 2014
Edit Who Will Be The 2014 Statistical Leaders? Mar 31 2014
Edit Can Spring Training Statistics Predict Breakout Power Seasons? Mar 25 2014
Edit Who Will Be The Best Defenders In 2014? Mar 11 2014
Edit Sochi Olympics - Dominant Countries Feb 25 2014
Edit United States on Track for Most Olympic Medals Feb 17 2014
Edit Sochi Predictions Feb 10 2014
Edit Super Bowl Predictor System Jan 30 2014
Edit Throwing Strikes Jan 20 2014
Edit Cannon Arms in 2013 Jan 10 2014
Edit Teams that Best Controlled the Running Game Dec 30 2013
Edit Opponent OPS and the Cy Young Award Dec 20 2013
Edit The Flat Bat Award 2013 Dec 09 2013
Edit Tim Lincecum Breaks Our Defensive Rankings Nov 19 2013
Edit Who Was the Real AL MVP? Nov 15 2013
Edit Making a Great Defensive Play Then Leading Off the Next Inning Nov 05 2013
Edit The 2013 Fielding Bible Awards Oct 28 2013
Edit Boston-St. Louis World Series Oct 21 2013
Edit Who are the Fielding Bible Award / Gold Glove Contenders? (Part II) Oct 07 2013
Edit Who are the Fielding Bible Award / Gold Glove Contenders? (Part I) Oct 04 2013
Edit Simmons Has Company Sep 23 2013
Edit Who are the Slowest Players in Baseball? Sep 12 2013
Edit Does Playing Shallow Work? Sep 06 2013
Edit Easy and Tough Saves Aug 30 2013
Edit Best Single-Season Runs Saved Totals Aug 19 2013
Edit Opponent OPS Aug 15 2013
Edit Who's Shifting and Who's Not Jul 25 2013
Edit Who Should Be Starting the 2013 All-Star Game? Jul 16 2013
Edit Edwin Encarnacion and Shifts Jul 11 2013
Edit The Pirates and Hot Streaks Jun 26 2013
Edit Scoring Runners from Third Base with Less Than Two Outs Jun 24 2013
Edit Rookie Total Runs and DRS Leaders Jun 19 2013
Edit Who Has The Most Total Runs in 2013? May 29 2013
Edit Who Are the Top Baserunners in Baseball? May 23 2013
Edit Who Are the Best and Worst Defensive Teams So Far? May 14 2013
Edit Timing Pitchers and Catchers To Prevent Stolen Bases Apr 24 2013
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