Holcomb won four medals at the FIBT World Championships: a gold (four-man: 2009) and three bronzes (two-man: 2009, mixed team: 2008, 2009). He also won the 2007 Two-man World Cup title, won the 2007 combined World Cup title, and finished second in the 2007 Four-Man World Cup standings. He became the first American man to win the Two-Man World Cup title. Holcomb also won the 2007 and 2010 Combined World Cup titles, and the 2010 4-Man World Cup title.