In the 3 mile team race, five athletes from each nation ran with only three counting.
Also, athletes who continue to compete with an injury run the risk of further damage or complications.
Other athletes who enrolled at University High remain in college but have also run into problems.
Only two other athletes had run faster in 2012.
This was the first race in which five athletes had run a four minute mile.
For a swim first, the athletes will line up on the sand and run into the water.
The athlete runs the marathon and knows the end of the race is near.
"I think we have the athletes to run with anybody," said Pierce.
Chavez turned in after another long day of watching athletes run and sweat.
Few athletes from other countries have run competitive times in those events this summer.