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

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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.

Report: Padres working on trading Andrew Cashner

ST. LOUIS, MO - JULY 21: Starter Derek Norris #3 of the San Diego Padres pitches against the St. Louis Cardinals in the first inning at Busch Stadium on July 21, 2016 in St. Louis, Missouri.  (Photo by Dilip Vishwanat/Getty Images)
Dilip Vishwanat/Getty Images
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Jon Morosi of FOX Sports and MLB Network reports that the Padres are working to trade starter Andrew Cashner. He notes that a deal may be consummated before he takes the hill for Tuesday’s start in Toronto against the Blue Jays. The Marlins, Orioles, and Rangers have had reported interest in Cashner.

Cashner is 4-7 with a 4.79 ERA and a 61/27 K/BB ratio in 73 1/3 innings. He missed over three weeks between June 11 and July 2 due to a strained neck.

The right-hander is earning $9.625 million this season and will be eligible for a fourth and final year of arbitration going into 2017.

Nationals activate Ryan Zimmerman from the disabled list

LOS ANGELES, CA - JUNE 22:  Ryan Zimmerman #11 of the Washington Nationals reacts to his run to tie the score 1-1 with the Los Angeles Dodgers during the second inning at Dodger Stadium on June 22, 2016 in Los Angeles, California.  (Photo by Harry How/Getty Images)
Harry How/Getty Images
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The Nationals announced on Tuesday that the club activated first baseman Ryan Zimmerman from the 15-day disabled list. Zimmerman had been out since July 7 with a strained rib cage on the left side.

Zimmerman has been inserted in the sixth spot in Tuesday’s lineup against the Indians. The veteran went on the DL with a lackluster .221/.284/.402 triple-slash line with 12 home runs and 38 RBI in 313 plate appearances.

Clint Robinson and Daniel Murphy split time at first base in Zimmerman’s absence, which allowed Trea Turner to get regular playing time at second base. Turner will play center field on Tuesday night.

The Nationals also activated pitcher Sammy Solis from the disabled list. Solis had been out since July 7 with inflammation in his right knee.