Date: 21st September 1985
Venue: Riviera Hotel & Casino, Outdoor Arena, Las Vegas, Nevada, USA
Title: IBF World Heavyweight Title
Promoted by: Butch Lewis Productions, Dynamic Duo Inc, Don King Productions
( 48 - 0 - 0 )
Weight: 221 1/2 lbs
( 27 - 0 - 0 )
Weight: 199 3/4 lbs
In the Ring Magazine Upset of the year for 1985, Light-heavyweight champion Michael 'Jinx' Spinks upset long-reigning heavyweight champion Larry Holmes in front of a sold-out crowd of 11,192 at The Riviera Hotel & Casino, Outdoor Arena in Las Vegas, Nevada.
Spinx took Holmes's IBF strap with a controversial unanimous decision, but what mattered more in a historical sense was Rocky Marciano's undefeated record of 49-0 which Holmes would have equalled with victory over Spinks.
Scores: Harold Lederman 142-143 | Dave Moretti 142-143 | Lawrence Wallace 142-145.