In 1988 it took all of 91 seconds for him to K.O. Michael Spinks to remain the undisputed heavywight champ
[DOC] [TLE] Mike Tyson Appreciation | Facebook Autoposter - Allingroups [PAR] Tyson is a former undisputed heavyweight champion of the world and holds the 
record ... Tyson won his first 19 professional bouts by knockout, with 12 of them ... 
the lineal champion when he knocked out Michael Spinks in the first 91 seconds 
of the fight.