Dee ihe ga-aga n'ihu na paragraf a - A mụrụ Katona na Eger, Heves, Hungary. Mgbe Katona dị afọ iri na asaa, ọ nọchitere anya obodo ya n'asọmpi egwuregwu mmiri nke mba Yurop n'afọ 1958
nke e mere na Budapest, Hungary. Na mita 1500 ọ bịara nke abụọ n'azụ Ian Black iji merie ọlaọcha ọla ọcha, ma merie otu ọla nchara na 4 x 200 mita freestyle relay. Afọ anọ ka e mesịrị na Leipzig na 1962 European Aquatics Championship, Katona lọtara n'ụlọ ya na ọla edo na 1500 mita freestyle. Na 1960 Summer Olympics na Rome, Katona ruru na ngwụcha nke 1500 mita freestyle ebe ọ kwụsịrị na 5th ebe, ma na 400 mita freestyle na 4 × 200 mita freestyle relay ọ dara iru eru si mbụ gburugburu okpomọkụ. Afọ anọ ka e mesịrị na 1964 Summer Olympics ọ bụ otu ihe ahụ, ọ dara iru finals na 400 mita freestyle ma ọ bụ 4 × 200 mita freestyle relay, ma na 1500 mita freestyle o jisiri rụchaa nke asatọ na ikpeazụ.