[1] He won an individual bronze and a team silver at the 1976 Summer Games.

He was coached by his father Karel Bártů, who competed for Czechoslovakia in modern pentathlon at the 1948 Summer Olympics.

[2][3] Jan secured his place at the 1976 Olympic Games at the age of 21 by finishing fourth in the 1976 Hungarian World Cup.

He took over the Head Coach position of the United States Pentathlon Association from 1995 to 1998.

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