When I’m on the field, there are things I want to hear and things I don’t want to hear. For example, “Neither of us has enough pitching, so we’re probably only going 5” is good while, obviously, “this is his 1st time behind the plate” is bad. Almost always, anything that signals the end of the game is good. And “shake em up” (line up and shake hands) is the end of the game – and usually comes in a mercy rule game – optimally in the bottom of the 5th when the run scores that makes it 10-0. “OK…thats it…shake em up”.
“Let’s go, line up” is ok, too. But that usually comes at the end of a regulation game. Shake em up is better.