Blinkers
A hood worn on a horse’s head to limit side vision, which can improve concentration. Blinkers are added or removed to relax a horse or give it more focus.
Main Track Only
A horse entered for main track only (MTO) is one hoping the weather forecast or track conditions will move the race off the turf course and onto the main track. They are scratched the morning of the race if the conditions stay dry.
Show Wager
Betting on a horse to finish in the first three spots, which pays out the same whether they win or run second or third.