Tic Tac Man
A Tic Tac Man or Tic Tac, is a bloke who'd communicate using hand signals about the odds of a race, usually horse races. He would wear white gloves to make his hands stand out. Unfortunately, with the use of modern day technology such as mobile phones and the internet, this profession has sadly disappeared almost completely, if not already.
Hell, that baseball coach is giving signals like a bloody Tic Tac Man, I wonder how he keeps track.