I’ve been watching baseball for years and I realized that I never knew the legal definition of a swing and what criteria an umpire uses to determine if it’s a swing or a checked swing. So I decided to look it up in the MLB rules. And it’s not in definitions, not in The Batter . At least, nowhere I could find.
I have heard various things from fellow fans:
It’s a swing when. . .
the bat crosses the plate
the bat crosses the foul line opposite the hitter
the hitter breaks his wrists
the bat crosses in front of the batter’s wrists
So what’s a “swing”? I’ve got plenty of opinions so I don’t need more; come with a cite!