The TC races are not dissimilar to the Olympics.
During the year, the athletes take 6 weeks to prepare for a meet. They do their prelim and then run in the finals. Then they take a breather and resume training.
They go to the Olympic Trials. They have their prelim, then their semi-finals and then they run the finals. Now they have to muster strong energy in shorter periods of recovery. They qualify, yet they\'ve expended energy, both mental and physical.
They get to the Olympics, they have their prelims, their semi\'s and then the finals. Every leg a potentially stronger group of competitors. If you had a special rule where 50% of the field got a bye in the middle round, you\'ll get their best shots even though they may not be as talented. They\'ll be more rested, they were preparing for that final event while others were expending energy to qualify.
Their training, pharmacology, restoration, level of competition, their surroundings, the surface they run on, everything is different.
The grind of the repetition many times results in hamstring pulls, false starts, hitting the wall for no apparent reason. Perfectly trained athletes, all of them. That 30 second spurt at absolute 100% energy jumps up and bites you in the ass because they may not have been required to use total 100% effort for an extended periof of time.
They\'re not machines, they mal-function due to additional stresses.
Thirty years before Secretariat won the Triple Crown, now 30 years since Affirmed, it looks easy on paper.
It can happen for no reason. Just an observation.