He competed in the men 's 400 metre individual medley at the 1980 Summer Olympics .
Dariusz Wolny ( born 21 March 1960 ) is a Polish swimmer .
Dariusz Wolny competed in the men 's 400 metre individual medley at the 1980 Summer Olympics .
Dariusz Wolny ( born 21 March 1960 ) is a Polish swimmer .