Originally Posted by feltdude
Hugo Koblet did it, then fell off the face of the earth.
Well not exactly. He did this after his 1951 TdF win:
1952: 1st Championship of Zurich
1953: 1st Tour de Suisse, 1st Tour de Romandie, 2nd Giro d'Italia
1954: 1st Championship of Zurich, 2nd Giro d'Italia
1955: 1st Tour de Suisse, 1st Swiss Road Race Championship
Not really too bad. Died in car wreck at age 39. Some say it was suicide.