The Home Run Committee’s Latest Report Isn’t the Final Word on Juiced Baseballs
SAN DIEGO — In the wake of a record-setting season for total home runs — 6,776, or 1.39 per team per game, an increase of 21.4% relative to last year, and 11.0% relative to the previous record, set in 2017 — on Wednesday morning, Major League Baseball released its long-awaited report from a committee of scientists and Rawlings representatives in their attempt to account for what has happened during the 2017-19 seasons. Shortly afterwards, an eight-member panel consisting of representatives from the committee, Rawlings, and MLB then fielded questions from the media. It was a lot to absorb, even given familiarity with the topic, but the general impression from all that’s been put forth is that MLB and Rawlings don’t have the firmest of grips on their product and its performance.
The full 27-page “Preliminary Report of the Committee Studying Home Run Rates in MLB” (PDF) is highly technical, and worthy of further scrutiny, scientific study, and perhaps skepticism, but a few things came through in the press conference and a cursory trip through the report. First, Rawlings and MLB denied that there’s anything underhanded when it comes to changing the ball. Said President/CEO of Rawlings Michael Zlaket, “We have never been asked to ‘juice’ or ‘de-juice’ a baseball. And we’ve never done anything of the sort. Never would.”
Second, beyond a reiteration of the committee’s 2018 finding (PDF) that the ball-to-ball variability in aerodynamic drag is greater than the year-to-year change in average drag — a consequence, the league and Rawlings maintain, of using a product made of natural materials and constructed in part by hand — is that even the scientists involved in MLB’s committee are still grappling with the complex interplay of factors that affect drag. Seam height plays the biggest role, but hardly the only one. It will take further study to untangle the other factors — work that both Rawlings and MLB say that they’re committed to doing, via the committee. Read the rest of this entry »