Rob Conway's fourth reign, Chet the Jett's second reign, and Vladimir Kozlov's only reign are all tied for the record of shortest reign in the title's history at less than one day each.
World Rally Championship | World Championship | NCAA Men's Division I Basketball Championship | Ultimate Fighting Championship | World Championship Wrestling | World Touring Car Championship | Six Nations Championship | County Championship | British Touring Car Championship | World Chess Championship | national championship | All-Ireland Senior Hurling Championship | Football League Championship | Extreme Championship Wrestling | Bowl Championship Series | Championship | All-Ireland Senior Football Championship | 2005 World Touring Car Championship season | The Open Championship | World Sportscar Championship | heavyweight | 2010 FIBA World Championship | List of heavyweight boxing champions | IMSA GT Championship | European Touring Car Championship | European Championship | World Snooker Championship | PGA Championship | 2010 IIHF World Championship | World Colored Heavyweight Championship |