<prompt> Pedzisa mutsara unotevera: Holcomb akahwina menduru ina paFIBT World Championships: goridhe varume vana: 2009 uye menduru nhatu dzebronze varume vaviri: 2009, timu yakavhenganiswa:  <response>: 2008, 2009. Akakundawo 2007 Two-man World Cup title, akakunda 2007 combined World Cup title, uye akapedza wechipiri muna 2007 Four-Man World Cup standings. Akava murume wokutanga wokuAmerica kukunda mukombe wenyika wevarume vaviri. Holcomb akahwinawo 2007 uye 2010 Combined World Cup mazita, uye 2010 4-Man World Cup zita. 