Alfredo Peñaloza (born 1947), 21 years old in 1968 Mexico City games finished the marathon in 2:29:48 placing 13th. Pablo Garrito, 30 years old at the times finished with 2:35:47. Four years later, Peñaloza finished the Munich Olympic Marathon in 2:25:51, placing 45th. His personal best was in 1972 in Boston Marathon with 2:18:46.
Rodolfo Gomez (born 1950) was certainly the one who made the bridge between the next generations. In 1980, he was 6th in Moscow Olympic marathon in 2:12:39, leading the race until the 35th km. His personal best was 2:09:33 in the New York marathon in 1982. Then he began to coach a number of athletes, as I said, Silva (born 68), 6th in 2:14:29 in Atlanta Olympic marathon, with a personal best of 2:08:66 in 1998.
Then a long silence arrives.
or how not to die of frustration

Peñaloza and Gómez were about the same age but ended up with different accomplishments. Gómez stopped competing at the age of 37. I remember having a skinny girl from the age of 5 in my team. She was brilliant before the culture and the family ate her. At 9 years old she was running 3:40 1km. She had an incredible cadence when running and a personal drive. But the culture inside the family just shaded her and finally she became looking and acting like her family. She left the team at the age of 12, before going to Middle School. How to create a culture where success is inevitable is maybe the main point.