Did Jackie Bradley, Jr.’s attitude get him sent down to the minors?

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When Jackie Bradley, Jr. started to draw a lot of notice, he was lauded to great degree for his attitude and work ethic. Indeed, some scribes got rather prickly if anyone dared to criticize Bradley or suggest that, maybe, he wasn’t ready to play every day in Boston.

This year his offensive performance was a big problem for the Sox, and he was eventually sent down to Pawtucket. But Joon Lee of Over the Monster reports that it may have been more than his lack of hitting that earned him a stint in the minors:

According to two league sources, there was a growing sense of frustration within the Red Sox clubhouse — both coaches and players — with Bradley due to his perceived “stubbornness with the coaching staff.” One source added that Bradley was unwilling to work with coaches to fix his swing. Both sources said Bradley’s attitude was one of the main reasons he was sent to the minors.

Did Bradley become frustrated as a result of his struggles? Or is it possible that the enthusiasm some had for him last year was premature?

Hard to say from the outside, of course. But one thing is certain: with Mookie Betts emerging and Rusney Castillo now in the organization, it could be a crowded center field situation in Boston and Bradley can’t afford to have anything else working against him at the moment.

MLB report blames seam height, not juiced balls, for 2019 home run surge

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SAN DIEGO — This morning Major League Baseball released a report from a committee of scientists tasked with studying baseballs and the home run surge from 2019. Their verdict: that manufacturing variation leading to inconsistent seam height — not any intentional act taken to “juice” baseballs — is the reason for last year’s power explosion.

There were 6,776 home runs hit during the regular season, which shattered the previous record, set in 2017, by nearly 11 percent. Numerous players around the league suspected or assumed that the league, which owns the ball manufacturer, Rawlings, had intentionally juiced the baseball to promote offense. The committee concluded in the report that “no evidence was found that changes in baseball performance were due to anything intentional on the part of Rawlings or MLB and were likely due to manufacturing variability.”

That conclusion would appear to only be partially accurate.

Dr. Meredith Wills, an astrophysicist who has been conducting her own research on baseballs and the home run explosion, published her own work on all of this in The Athletic last June. Wills concluded that, based on her examination of baseball seams and seam height, a key part of the manufacturing process — the drying of damp, finished baseballs after assembly is complete — likely did change.

Specifically, she concluded that seam height and decreased bulging of baseballs which led to less aerodynamic drag and farther ball flight was likely the result of Rawlings using heaters to dry balls, as opposed to the traditional air-drying, allowing them to produce more balls in a shorter period of time. Wills told NBC Sports this morning that she suspects Rawlings did this because many more balls were needed due to Major League Baseball mandating that Triple-A adopt the major league ball for the 2019 season.

As such, the key word in this morning’s report is “intentional.” Wills:

“The decrease in drag was very likely unintentional, but the change in the drying process would be intentional. No, they didn’t intend to juice the ball, but yes, they did make an intentional change to the manufacturing process. It was not ‘manufacturing variability’ it was deliberate process improvement to accommodate higher demand. ‘Variability’ makes it sound like it’s random or a mistake. It was not.”

There is also the matter of the decrease in ball flight and home runs observed — and confirmed by today’s report — in the 2019 postseason.

MLB’s expert panel basically punts on any explanations for the variation, noting small sample size and no other apparent explanation. As such, the matter for the immediate change in the home run rate and fly ball distance the moment we moved from September to October baseball is not clear. Wills is continuing her research on 2019 postseason game balls — a matter about which there has already been no small amount of controversy of late — and expects to publish her results soon.

There will be a press conference regarding the study here at the Winter Meetings at 1PM Eastern time today. NBC Sports will be at that press conference. NBC Sports has a good number of followup questions.