NEW YORK -- Major League Baseball has slightly deadened its baseballs amid a years-long surge in home runs, a source confirmed to The Associated Press on Monday.

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Feb9,2021
NEW YORK -- Major League Baseball has slightly deadened its baseballs amid a
years-long surge in home runs, a source confirmed to The Associated Press on
Monday.
MLB anticipates the changes will be subtle, and a memo to teams last week cites
an independent lab that found the new balls will fly 1 to 2 feet shorter on balls
AssociatedPress
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Report:MLBslightlydeadening
baseballamidyears-longhomerun
surge

2. hit over 375 feet. Five more teams also plan to add humidors to their stadiums,
meaning 10 of MLB's 30 stadiums are expected to be equipped with humidity-
controlled storage spaces.
A person familiar with the note spoke to The Associated Press on condition of
anonymity Monday because the memo, sent by MLB executive vice president of
baseball operations Morgan Sword, was sent privately. The Athletic first
reported the contents of the memo.
The makeup of official Rawlings baseballs used in MLB games has come under
scrutiny in recent years. A record 6,776 homers were hit during the 2019 regular
season, and the rate of home runs fell only slightly during the pandemic-
shortened 2020 season -- from 6.6% of plate appearances resulting in homers
in 2019 to 6.5% last year.
A four-person committee of scientists commissioned by MLB concluded after
the 2019 season that baseballs had less drag on average than in previous
seasons, contributing to the power surge. Their report blamed the spike in part
on inconsistencies in seam height.
MLB's balls are hand-sewn by workers at Rawlings' factory in Costa Rica,
leading to inevitable, minor deviations in production that can have sizeable
repercussions.
The league mandates all baseballs have a coefficient of restitution (COR) --
essentially, a measure of the ball's bounciness -- ranging from .530 to .570, but
in recent years the average COR had trended upward within the specification
range.
In an effort to better center the ball, Rawlings has loosened the tension on the
first of three wool windings within the ball. Its research estimates the
adjustment will bring the COR down .01 to .02 and will also lessen the ball's
weight by 2.8 grams without changing its size. The league does not anticipate
the change in weight will affect pitcher velocities.
The memo did not address the drag of the baseball, which remains a more
difficult issue to control.
The Colorado Rockies, Arizona Diamondbacks, Seattle Mariners, New York
Mets and Boston Red Sox already have humidors. The five teams adding
@
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8 00PMCT
For the breakout prospects portion of this year's look at the top young players in
baseball, I'm looking at prospects ranking below a 45+ future value (FV sums
up the total future value of a player into one number). Drawing the line there
removes the top 167 prospects in baseball and pinpoints the best candidates to
move up in 2021 -- in some cases onto next year's top 100.
If you're looking for the current top 100 prospects who will be on the top 10-20
next year, I reference them on that list and I'll go even deeper on my team-by-
team lists later in the week, but my best candidates are Riley Greene, Grayson
Rodriguez and Corbin Carroll. Some other big risers (Matt Canterino, Slade
Cecconi, Oswald Peraza, Seth Johnson) rose too much based on what they did
at the alternate site and/or instructional league to qualify for this list.
Here is (at least) one player on each of MLB's 30 teams who could put up a
breakout performance in the minors in 2021.
KileyMcDaniel
ESPNMLBInsider
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