Most heavyweight titles won by a former middleweight

Most heavyweight titles won by a former middleweight
Who
Roy Jones Jnr, Robert James `Bob' Fitzsimmons
Where
United States (Las Vegas)
When
This remarkable feat has been achieved only twice in 106 years. The first time was by Robert James `Bob' Fitzsimmons (UK) when he knocked out James J. Corbett (USA) at Carson City, Nevada, USA on 17 March 1897. Roy Jones Jnr (USA) matched this when he beat John Ruiz (USA) for the World Boxing Association title by unanimous decision on 2 March 2003 at Las Vegas, Nevada, USA.