Date
Champions
Opponents
Score, Location

International Boxing Federation
1989-06-21
TYSON Mike
WILLIAMS Carl
Technical Knockout 1/12
Atlantic City, USA
1989-02-25
TYSON Mike
BRUNO Frank
Technical Knockout 5/12
Las Vegas, USA
1988-06-27
TYSON Mike
SPINKS Michael
Knockout 1/12
Atlantic City, USA
1988-03-21
TYSON Mike
TUBBS Tony
Technical Knockout 2/12
Tokyo, Japan
1988-01-22
TYSON Mike
HOLMES Larry
Technical Knockout 4/12
Atlantic City, USA
1987-10-16
TYSON Mike
BIGGS Tyrell
Technical Knockout 7/12
Atlantic City, USA
1987-08-01
TYSON Mike
TUCKER Tony
Unanimous Decision 12/12
Las Vegas, USA
1987-05-30
TUCKER Tony
DOUGLAS James
Technical Knockout 10/15
Las Vegas, USA
Tony Tucker won vacant IBF heaveweight title after Michael Spinks was stripped of his champion belt for refusing to fight their mandatory challenger Tony Tucker.
1986-08-06
SPINKS Michael
TANGSTAD Steffen
Technical Knockout 4/12
Las Vegas, USA
1986-04-19
SPINKS Michael
HOLMES Larry
Split Decision 15/15
Las Vegas, USA