The following year he was affected by the 1980 Summer Olympics boycott. Despite a run of 8:12.0 minutes at the Golden Gala in Rome – the second fastest that year after Bronisław Malinowski – he was unable to compete at a major competition.[10] He did compete at the Liberty Bell Classic (Olympic Boycott Games) and while Malinowski took the steeplechase, Rono was the gold medallist in the 5000 m.[11]
He won back-to-back steeplechase titles at the Kenyan Athletics Championships in 1983 to 1984.[12] However, upon entering top level international competitions he proved to be past his best. At the 1983 World Championships in Athletics he ranked twentieth in the semi-finals with a time of 8:33.97 minutes.[13] He went out in the first round at the 1984 Los Angeles Olympics, finishing ninth in his heat with a time of 8:41.75 minutes.[14]
He declined in the steeplechase thereafter. His next international appearance came at the 1988 IAAF World Cross Country Championships. There he was part of a dominant Kenyan team led by John Ngugi which took all top nine placings (bar Ethiopia's Abebe Mekonnen in fifth). Rono shared in the team gold medals for his eighth-place finish.[15]