Reds' manager Dusty Baker watches from the dugout as his team plays the Giants in Game 5 of their MLB NLDS playoff baseball series in Cincinnati

Latest research shows managers inefficient when taking pitchers out of the game


Peter Dizikes of the MIT News Office highlights one of the finalists in the MIT Sloan Sports Analytics Conference, currently being held in Boston. The paper, “A Data-driven Method for In-game Decision Making in MLB”, was developed by John Guttag and Ganeshapillai Gartheeban.

Guttag and Gartheeban’s developed a model that suggested when managers should take their starting pitchers out of the game by using data from the first 80 percent of the 2006-10 seasons to develop a model. Then they tested their model against the results in the final 20 percent of the season.

Dizikes summarizes some of the important findings:

The study finds that from the fifth inning on, in close games, pitchers who were left in games when the model recommended replacing them allowed runs 60 percent of the time, compared to 43 percent of the time overall.


Over 21,538 innings, the Guttag-Gartheeban model disagreed with the manager’s decision regarding his starting pitcher 48 percent of the time. About 43 percent of the time, the manager left the starting pitcher in when the model indicated he should be replaced. In just 5 percent of the cases did managers pull starting pitchers when the model suggested they should stay in the game

Guttag and Gartheeban do note that their methodology doesn’t consider every factor and recognize that the manager is considering a lot more than just the current game situation. Hypothetically, leaving Justin Verlander in with a 110 pitch count in a 2-1 game in the bottom of the eighth in late September when the Tigers are only in the lead by a game could be justifiable when most objective models would suggest taking him out.

That being said, many managers can improve simply by not having their pitchers throw unnecessary innings, like the seventh inning after their team has taken a 10-1 lead.

The Cubs clinch World Series berth with NLCS Game 6 win

CHICAGO, IL - OCTOBER 22:  The Chicago Cubs celebrate defeating the Los Angeles Dodgers 5-0 in game six of the National League Championship Series to advance to the World Series against the Cleveland Indians at Wrigley Field on October 22, 2016 in Chicago, Illinois.  (Photo by Dylan Buell/Getty Images)
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After 71 years, the Cubs are headed back to the Fall Classic.

The dominance with which Clayton Kershaw attacked the Cubs in Game 2 of the NLCS was nonexistent in Game 6 as the Dodgers’ ace loaded the bases to start the first inning and scattered five extra bases and five runs over five frames. By the time Dave Roberts pulled his starter in the sixth inning, Kershaw was sitting on a Game Score of 33, the lowest he’s mustered since the start of the 2015 season. Only one of his strikes came via curveball, and whether he was having difficulty locating his off-speed stuff or felt more confident with the fastball-slider combo, it was the fewest curves he’d seen land for strikes all year (per David Adler).

Where the Dodgers were able to give Kershaw the edge in Game 2, they found themselves powerless against opposing hurler Kyle Hendricks. Hendricks turned out 7 1/3 scoreless frames with two hits and six strikeouts, preserving the Cubs’ second shutout of the postseason and the first since they bested the Giants in Game 1 of the NLDS. After his 1-0 loss to the Dodgers early in the NLCS, seeing the MLB ERA leader turn out a gem was a relief for the Cubs, especially one as spectacular as an 88-pitch two-hitter.

With Hendricks effectively stymieing the Dodgers’ best attempts to get on base, the Cubs played to their strengths at the plate. Kris Bryant and Ben Zobrist cleared the bases in the first inning for a two-run lead, followed by a Dexter Fowler RBI single in the second. Willson Contreras came through in the fourth inning for the Cubs, lifting an 87 m.p.h. slider to left field for his first home run of October, while Anthony Rizzo hit his second homer of the postseason on a 1-1 fastball in the fifth.

Neither bullpen allowed a single run from the sixth inning onward. Dodgers’ right-hander Kenley Jansen took the ball from Kershaw in the sixth, scattering four strikeouts over three innings and denying the Cubs so much as a single baserunner through the end of the game. Aroldis Chapman, meanwhile, issued just one walk in 1 1/3 scoreless frames, inducing a Yasiel Puig double play to clinch the Cubs’ 17th franchise pennant.

With the win, the Cubs will face off against the Indians in Game 1 of the World Series on Tuesday at 8 PM EDT. And, in case you needed a reminder:

Video: Willson Contreras blasts first postseason home run off of Kershaw

CHICAGO, IL - OCTOBER 22:  Willson Contreras #40 of the Chicago Cubs celebrates after hitting a solo home run in the fourth inning against the Los Angeles Dodgers during game six of the National League Championship Series at Wrigley Field on October 22, 2016 in Chicago, Illinois.  (Photo by Jonathan Daniel/Getty Images)
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So much for Clayton Kershaw posing a threat tonight. The Cubs got their knocks in early and often against the Dodgers’ ace during Game 6 of the NLCS, racking up three runs in the first three innings before rookie catcher Willson Contreras unleashed his first postseason home run in the bottom of the fourth inning.

According to’s Phil Rogers, Contreras became the 10th Cub to homer in the 2016 playoffs, following big hits by Addison Russell, Anthony Rizzo, Dexter Fowler, Miguel Montero, David Ross, Jake Arrieta, Kris Bryant, Travis Wood, and Javier Baez. Of the ten home run hitters, Contreras joins catchers David Ross and Miguel Montero as yet another backstop capable of driving the long ball (and, less importantly, as another player capable of a sweet, sweet bat flip).

Rizzo, whose last homer was a deep drive to right field off of Los Angeles right-hander Pedro Baez in Game 4 of the NLCS, piled on Kershaw’s five-run outing with another home run in the bottom of the fifth inning. Kershaw called it a night after five frames, and the Cubs currently lead the Dodgers 5-0 in the sixth inning.