1984 Sarajevo Games, 1988 Calgary Games, 1992 Albertville Games, 1994 Lillehammer Games
Medal count: One gold
In 1988, during his second appearance at the Olympics, Jansen was set to compete in the 500-meter sprint when he learned that his sister had died of leukemia. He fell in the first turn, and also crashed a few days later in the 1000-meter, earning no medals in the Calgary games. He failed to medal again four years later in Albertville, with his best finish being fourth in the 500-meter. After losing the 500 again in 1994, Jansen surprisingly won the 1000, setting a world record. He took his victory lap while holding his infant daughter Jane, who was named after his late sister.