Baseball managers yell nonsense at umpires to boost team morale but avoid getting thrown out of the game!
Whenever we watch a game of our favorite sport we get very excited.
Sometimes we yell at the television, sometimes we yell against other people around us, and if we are at the stadium we yell at the players, the coaches and pretty much anything we can think of.
If we feel that way outside the field, it’d be easy for you to imagine how the coaches and the players feel inside.
As a professional baseball manager you are not really allow to lose your temper, especially since they are paying you good money for having someone to throw you out of every possible game.
Baseball managers sometimes yell nonsensical things at umpires (e.g. "I had bad wine at an Italian restaurant") to invigorate their team, while keeping themselves from being thrown out of the game.