1. Tyson vs Johnson

0

. 9 May 1985

Fight #8 Win 8–0 Michael Johnson KO 1 (6), 0:39 Sep 5, 1985 Age: 19 years, 67 days Atlantis Hotel and Casino, Atlantic City, New Jersey, U.S.

2. Tyson vs Jameson

0

. 24 January 1986

Fight #17 Win 17–0 Mike Jameson TKO 5 (8), 0:46 Jan 24, 1986 19 years, 208 days Trump Plaza Hotel and Casino, Atlantic City, New Jersey, U.S.

3. Tyson vs. Zouski

0

. 10 March 1986

Fight #19 Win 19–0 Steve Zouski KO 3 (10), 2:39 Mar 10, 1986 19 years, 253 days Nassau Veterans Memorial Coliseum, Uniondale, New York, U.S.

4. Tyson vs. Tillis

0

. 3 May 1986

Fight #20 Win 20–0 James Tillis UD 10 May 3, 1986 Age: 19 years, 307 days Civic Center, Glens Falls, New York, U.S.

5. Tyson vs. Berbick

0

. 22 November 1986

Fight #28 Win 28–0 Trevor Berbick TKO 2 (12), 2:35 Nov 22, 1986 Age:20 years, 145 days Las Vegas Hilton, Winchester, Nevada, U.S. Won WBC heavyweight title

6. Tyson vs. Holmes

0

. 22 January 1988

Fight #33 Win 33–0 Larry Holmes TKO 4 (12), 2:55 Jan 22, 1988 Age: 21 years, 186 days Convention Hall, Atlantic City, New Jersey, U.S. Retained WBA, WBC, and IBF heavyweight titles

7. Tyson vs. Spinks

0

. 27 June 1988

Fight #35 Win 35–0 Michael Spinks KO 1 (12), 1:31 Jun 27, 1988 Age: 21 years, 363 days Convention Hall, Atlantic City, New Jersey, U.S. Retained WBA, WBC, and IBF heavyweight titles; Won The Ring heavyweight title

8. Tyson vs. Bruno I

0

. 25 February 1989

Fight #36 Win 36–0 Frank Bruno TKO 5 (12), 2:55 Feb 25, 1989 Age: 22 years, 240 days Las Vegas Hilton, Winchester, Nevada, U.S. Retained WBA, WBC, IBF, and The Ring heavyweight titles

9. Tyson vs Douglas

0

. 11 February 1990

Fight #38 Loss 37–1 Buster Douglas KO 10 (12), 1:22 Feb 11, 1990 Age: 23 years, 226 days Tokyo Dome, Tokyo, Japan Lost WBA, WBC, and IBF heavyweight titles