Titles Vacated Due To Death?

[freudianfloyd]

Can anybody name a fighter that died while champ? In other words has there ever been a title vacated due to the death of a fighter? The only one I can think of is Pancho Villa, but there has to be some I'm missing. The number of deaths in boxing lately had me thinking.

[Miburo]

Salvador Sanchez of course. Stanley Ketchel.