A common scene in movies and television shows dealing with horse racing is the weighing of the jockeys and saddles. Subsequently, officials load some of the saddles with extra weight. I get that jockeys have to be small, so the horse doesn’t have to carry so much weight. What I don’t understand is how the weight of the individual jockeys is used.
Does every horse have to carry as much as the heaviest jockey? If so, why not enter a draft horse ridden by a sumo?
Is the weight of the jockeys averaged, and if you’re lighter than that average you have to carry more weight? This would explain the extra weight, without rewarding heavier jockeys on stronger horses, but seems like a lot of math.
What is the deal, and is the jockey’s weight listed in the racing form, or pertinent to betting?