Huh. So we're finally going to have a clear definition of what is a check swing and what's not:
Quote:
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The decision will be made based on whether the bat head is ahead of the knob by more than 45 degrees — matching the first-base line for a right-handed hitter and the third-base line for a left-handed hitter. Short of 45 degrees will be called a no swing.
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https://www.nbcnewyork.com/news/spor...6271681/?amp=1