 Starting with the 2004–2005 season, he achieved second and third ranked American driver.In the 2006–2007 season Holcomb (with team members Jovanovic and Kreitzburg) won the two-man World Cup Championship, while his four-man team (with Jovanovic, Kreitzburg, and Mesler) finished second.As Holcomb rose through the ranks of American bobsledders however, a degenerative eye disease (Keratoconus), initially diagnosed in 2002, began to affect his daily life and competitive skills which led to depression.