Champion | Date Won | Location | Notes |
Ken Shamrock | July 14, 1995 | Casper, Wyoming | -a- |
Dan Severn | May 17, 1996 | Detroit, Michigan | -b- |
Mark Coleman | February 7, 1997 | Dothan, Alabama | |
Maurice Smith | July 27, 1997 | Birmingham, Alabama | -c- |
Randy Couture | December 21, 1997 | Yokohama, Japan | -d- |
Bas Rutten | May 7, 1999 | Birmingham, Alabama | -e- |
Kevin Randleman | November 14, 1999 | Yokohama, Japan | -f- |
Randy Couture [2] | November 17, 2000 | Atlantic City, New Jersey | |
Josh Barnett | March 30, 2002 | Las Vegas, Nevada | -g- |
Ricco Rodriguez | September 27, 2002 | Uncasville, Connecticut | -h- |
Tim Sylvia | February 28, 2003 | Atlantic City, New Jersey | -i- |
Frank Mir | June 19, 2004 | Las Vegas, Nevada | |
Andrei Arlovsky | February 5, 2005 | Las Vegas, Nevada | -j- |
Tim Sylvia [2] | April 15, 2006 | Anaheim, California | |
Randy Couture [3] | March 3, 2007 | Columbus, Ohio | |
Antonio Rodrigo Nogueira | February 2, 2008 | Las Vegas, Nevada | -k- |
Brock Lesnar | November 15, 2008 | Las Vegas, Nevada | -l- |
Frank Mir [2] | December 27, 2008 | Las Vegas, Nevada | -m- |
-a- Defeated Dan Severn to win the title.
-b- Won via split decision.
-c- Won via split decision.
-d- Won via split decision. Title vacated on October 18, 1998 due to lack of defenses.
-e- Defeated Kevin Randleman via split decision to win vacant belt. Title then vacated.
-f- Defeated Pete Williams via unanimous decision to win vacant title.
-g- Stripped of the title due to steroid usage.
-h- Defeated Randy Couture to win vacant title.
-i- Tests positive for steroids at UFC 45. Vacates the belt upon being suspended.
-j- Defeated Tim Sylvia on February 5, 2005 for "interim" heavyweight title. Promoted to "undisputed" champ on August 12, 2006.
-k- Defeated Tim Sylvia for interim title.
-l- Defeated Couture.
-m- Defeated Nogueria for the interim title.