the bench coach

In baseball, most of the coaches' titles are self-explanatory: the Hitting Coach coaches hitting; the Pitching Coach coaches pitching; the Bullpen Coach is in charge of the bullpen; etc.

Then there's the Bench Coach... ?? I could look it up, but until then I can only imagine what a Bench Coach does, and this is what I imagine a Bench Coach typically says:

"Hey, are you done sitting there? Then clean up after yourself! My bench... what a mess... were you eating sunflower seeds?"

"You two - sit up straight! Show some respect for the game."

"How rude! Now that's a disgusting habit."

"Hey, if it's so funny, then why don't you say it loud enough so everyone can hear it?"

"We'll have none of that. Go to the clubhouse... go to the clubhouse!"