Swimming, FINA Aquatics World Championships, 100 metre butterfly - 100 metre butterfly World Champions, men

1973 Bruce Robertson
1975 Gregory Jagenburg
1978 Joe Bottom
1982 Matthew Gribble
1986 Pablo Morales
1991 Anthony Nesty
1994 Rafał Szukała
1998 Michael Klim
2001 Lars Frölander
2003 Ian Crocker
2005 Ian Crocker
2007 Michael Phelps
2009 Michael Phelps
2011 Michael Phelps