Dee ihe na-aga n'ihu maka paragraf a - Osoro nọchitere anya Kenya ugboro abụọ n'egwuregwu ụwa na 1991, na-agba ọsọ na 1991 IAAF World Cross Country Championship (ebe ọ bịara nke ise na agbụrụ dị ogologo) wee gaa n'okporo ụzọ na 1991 World Championships na Athletics (na-ewepụ ya na 5000 mita okpomọkụ site na obere ọdịiche megide Dionísio Castro). Agbanyeghị, ọ meriri nrite na 5000 m na 1991 All-Africa Games nke afọ ahụ. Ọ pụtara na ndị otu Kenya World Cross Country maka oge nke abụọ na 1992 IAAF World Cross Country Championships
, n'agbanyeghi na o nweghi ihe ịga nke ọma na nnwale a ebe ọ kwụsịrị na 23rd. N'etiti njem ya na sekit ahụ, ọ meriri na Belfast International Cross Country zutere.