I assume the question refers only to Major League Baseball. It's nostalgia! There is no major sport more mired in and wired to tradition than major league Baseball. e.g., the new Fenway looks like the old Fenway. Perhaps the thinking is that the manual scoreboards soften the blow of the ten $ beer.
Hand operated
yes there is hand operated rear brakes
the piston is operated by the crankshaft
It means a tool, machine or piece of equipment that is powered by the human hand.
An optical microscope is operated by hand, by the user.
No it is not. It must be operated by human hand.
A foot pedal you make it run by the pedal. The hand oerate you turn on and off with a switch or just closing the lid.
power loom
Hand wheel is the control consisting of a wheel whose rim serves as the handle by which a part is operated
You can purchase a hand-operated coffee grinder at Amazon. A website called OldCoffeeGrinders seem to specialize in the item and have a large selection. That could also be a good option.
Hand powered - 1861 Recoil operated - 1881
i dont really know why because its a stupid question