Date
Champions
Opponents
Score, Location

World Boxing Council
1978-02-15
SPINKS Leon
ALI Muhammad
Split Decision 15/15
Las Vegas, USA
Leon Spinks was stripped of the title as he chose to defend against Muhammad Ali instead of Ken Norton, the WBC top contender. The WBC heavyweight title was awarded to Ken Norton, who beat Jimmy Young and became the mandatory challenger.
1977-09-29
ALI Muhammad
SHAVERS Earnie
Unanimous Decision 15/15
New York, USA
1977-05-16
ALI Muhammad
EVANGELISTA Alfredo
Unanimous Decision 15/15
Landover, USA
1976-09-28
ALI Muhammad
NORTON Ken
Unanimous Decision 15/15
New York, USA
1976-05-24
ALI Muhammad
DUNN Richard
Technical Knockout 5/15
Munich, West Germany
1976-04-30
ALI Muhammad
YOUNG Jimmy
Unanimous Decision 15/15
Landover, USA
1976-02-20
ALI Muhammad
COOPMAN Jean-Pierre
Knockout 5/15
Hato Rey, Puerto Rico
1975-10-01
ALI Muhammad
FRAZIER Joe
Referee Technical Decision 14/15
Quezon City, Philippines
1975-06-30
ALI Muhammad
BUGNER Joe
Unanimous Decision 15/15
Kuala Lumpur, Malaysia
1975-05-16
ALI Muhammad
LYLE Ron
Technical Knockout 11/15
Las Vegas, USA