An interesting interview I found with Peter Elliot in which he relates the following story about a Kenyan agent at the Seoul Olympics :
"I remember before the 800m final I saw one of the Kenyans' agents before the race and I asked him who he thought would win, and he said 'Paul Ereng.' Well at that time he wasn't a favourite and he had lost a previous race at Crystal Palace. But he won it. So when I saw the agent again before the 1500m final I asked him again about who he thought would win. And he said 'Peter Rono.'
"At the time, he had only won the Kenyan trials, and I don't think he ever won another race. But he has gone down in history because he got it right when it mattered."
Elliott is right. Rono - who became the youngest Olympic 1500m champion at the age of 21 years and 62 days - never did win another major race.
When you think about it, the 88 Olympic middle-distance finals were extremely fishy in that a Kenyan came out of nowhere in each event and rarely or never performed at such a level again.
https://www.insidethegames.biz/articles/1016229/twenty-five-years-on-peter-elliott-says-his-seoul-olympics-silver-was-his-greatest-achievement-but-it-took-12-years-to-believe-it