Per the rulebook, the strikezone is a 3 dimensional shape that includes the entire area above the plate.
Per ABS, it’s the middle of the strikezone in a 2 dimensional rectangle.
So you could clip a part of the plate with a moving pitch that doesn’t register as a strike in the middle, but WAS a strike (per the rulebook) at the front or back.
I didn’t phrase that well. What I meant, for a checked swing to be called a strike, the bat must cross from the back to the front of the plate. If it stops half way, it is not a strike. It that correct?
They’re testing a rule that would define it much more favorably for hitters than the conventionally accepted range. Under the proposed rule, an attempt would only count as a swing if the bat goes all the way to parallel with the base line opposite the hitter (so a righty could bring the bat all the way to parallel with the first base line before it could be called a swinging strike). Initial testing showed a reduction in strikeouts under this rule, so they’re giving it a bigger trial in AAA, where the teams can challenge a swing/no swing call the same way they can challenge any other ball or strike.
Yes and no. The base ump has a better view of how far around they went. However, the base ump’s definition of a check swing can vary from ump to ump, so… kinda.
Correct. A swinging strike is simply a pitch “struck at and missed”. There is no other definition. Most umpires go by a 45-degree rule, meaning if the bat crosses more than 45 degrees across the plate they’ll call it a strike, but that is convention, not rule. And it’s also subjective. Kind of like the rules on lefties throwing to 1B. The rules say you must step “towards the base”. What does that mean? 45 degrees is a standard convention, but it is not defined as such.