Mike Tyson Bombs Michael Jack Johnson This Day September 5, 1985
- Mike Tyson 219½ lbs
- Michael Johnson 196 lbs
- KO at 0:39 in round 1 of 6
- Location: Atlantis Hotel & Casino, Atlantic City, New Jersey, USA
- Referee: Frank Cappuccino
At 219.5 lbs, Tyson was six pounds heavier than in his previous bout less than a month prior and was 23.5 lbs. heavier than Johnson.
A left hook to the body sent Johnson down 23 seconds into the fight. He was up at the count of three. Tyson came forward and threw a big right hand that caught Johnson flush on the jaw and sent him immediately down. Without beginning a count, the referee waved an end to the bout. Johnson remained down in the ring momentarily before being helped to a stool.