From: "John Beamish" 

The real reason:  time.  When I umped, if one team was ahead by that many
runs the game was likely not going to hit enough innings for a regulation
game and the kids had to be off the diamond so that the next scheduled game
could start.  All other sports have time constraints in the game duration.

"John Cuccia"  wrote in message
news:h1947017h5u1nhd223ioevdvb43n5r2mkq{at}4ax.com...
>
> When I was a kid the baseball leagues I played in had the "ten run
> rule" (which I've heard called the "mercy rule"
lately).  If one team
> was ahead by ten or more runs after five innings, the game was called.
>
> No other sport had anything like it, as far as I know.
>

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