Achievements Competing in three Winter Olympics, he won four medals with two golds (Two-man: 2002, Four-man: 1998), one silver (Two-man: 1992), and one bronze (Two-man: 1998). Zimmerman also won eight medals at the FIBT World Championships with five golds (Two-man: 1991, 1996, 2000. Four-man: 1996, 2001) and three silvers (Two-man: 1999, 2004. Four-man: 2000).