Middleweight · United States

Austin Williams

20-3-0 13 KO · 2019–2026

Austin Williams is a middleweight boxer from United States, born May 3, 1996. Record 20-3-0 with 13 knockouts over 2019–2026. Austin Williams last fought Vito Mielnicki Jr. on Sep 4, 2026 and lost by UD over 10 rounds.

Also: Austin Williams (boxer)
BornMay 3, 1996
Country🇺🇸 United States
StanceOrthodox
NicknameAmmo
DebutApr 26, 2019
Career2019–2026
Rounds boxed148
KO share65%
Born inMilwaukee, Wisconsin, U.S.
TitlesWBA CONTINENTAL AMERICAS MIDDLEWEIGHT 2025
Boxerbook rating#20 in Middleweight · 1895 ± 125Why here ›
Confirmed bouts14 of 23 · 12 official

Record and next fight

Record
20-3-0, 13 KOs · 2019–2026
Next fight
No next fight confirmed

Last result

L
Vito Mielnicki Jr. 🇺🇸
For IBF-USBA, WBO Global and WBC Continental Americas middleweight titles
UD 10/10 · Prudential Center, Newark, 🇺🇸
2026-09-04 ›
official ★

The record

23 bouts, 2019–2026, newest first. Records under each bout are both boxers going in.

Bouts by source: English Wikipedia · 23, WBA Fights Master Scores · 6, Texas Department of Licensing and Regulation — Combative Sports Results · 4, Nevada State Athletic Commission — Results · 3, Wikipedia (ja) · 2, IBF/USBA Results · 1, California State Athletic Commission — Results (archive) · 1

L
Vito Mielnicki Jr. 🇺🇸
For IBF-USBA, WBO Global and WBC Continental Americas middleweight titles
UD 10/10 · Prudential Center, Newark, 🇺🇸
Williams 20-2-0 · Mielnicki Jr. 23-1-0
2026-09-04 ›
official ★
L
Carlos Adames 🇩🇴
For WBC middleweight title
UD 12/12 · Caribe Royale, Orlando, 🇺🇸
Williams 20-1-0 · Adames 24-1-1
2026-03-21 ›
✓✓ two sources
W
Wendy Toussaint
UD 10/10 · Madison Square Garden, New York City, 🇺🇸
Williams 19-1-0 · Toussaint —
2026-01-31 ›
✓ one source
W
Ivan Vazquez
TKO 9/10 · The Ford Center At The Start, Frisco, 🇺🇸
Williams 18-1-0 · Vazquez —
2025-07-19 ›
official ★
W
Patrice Volny 🇨🇦
WBA CONTINENTAL AMERICAS MIDDLEWEIGHT
UD 12/12 · Caribe Royale, Orlando, 🇺🇸
Williams 17-1-0 · Volny 19-1-0
2025-03-15 ›
official ★
W
Gian Garrido
TKO 5/8 · Wells Fargo Center, Philadelphia, Pennsylvania, 🇺🇸
Williams 16-1-0 · Garrido —
2024-11-02 ›
✓ one source
L
Hamzah Sheeraz 🇬🇧
For WBC Silver middleweight title
TKO 11/12 · Kingdom Arena, Riyadh, 🇸🇦
Williams 16-0-0 · Sheeraz 19-0-0
2024-06-01 ›
✓✓ two sources
W
Armel Mbumba-Yassa
WBA INTERNATIONAL MIDDLEWEIGHT
KO 7/10 · The Cosmopolitan, Las Vegas, 🇺🇸
Williams 15-0-0 · Mbumba-Yassa —
2024-02-03 ›
official ★
W
Steve Rolls 🇨🇦
For IBF North American middleweight title
UD 10/10 · Caribe Royale, Orlando, 🇺🇸
Williams 14-0-0 · Rolls 22-2-0
2023-09-23 ›
official ★
W
River Wilson-Bent
TKO 8/10 · The O2 Arena, London, 🇬🇧
Williams 13-0-0 · Wilson-Bent —
2023-04-01 ›
✓ one source
W
Simon Madsen
UD 10/10 · Gila River Arena, Glendale, Arizona, 🇺🇸
Williams 12-0-0 · Madsen —
2022-12-03 ›
✓ one source
W
Kieron Conway 🇬🇧
For vacant WBA International middleweight title
UD 10/10 · T Mobile Arena, Las Vegas, 🇺🇸
Williams 11-0-0 · Conway 18-2-1
2022-09-17 ›
official ★
W
Chordale Booker 🇺🇸
Vacant WBA CONTINENTAL AMERICAS MIDDLEWEIGHT
TKO 1/10 · Madison Square Garden, New York, 🇺🇸
Williams 10-0-0 · Booker 17-0-0
2022-04-30 ›
official ★
W
Javier Maciel 🇦🇷
TKO 6/8 · Alexandra Palace, London, 🇬🇧
Williams 9-0-0 · Maciel —
2022-02-12 ›
✓ one source
W
Quatavious Cash
TKO 2/8 · MGM Grand Garden Arena, Las Vegas, 🇺🇸
Williams 8-0-0 · Cash —
2021-12-04 ›
official ★
W
Denis Douglin 🇺🇸
UD 8/8 · American Airlines Center, Dallas, 🇺🇸
Williams 7-0-0 · Douglin —
2021-03-13 ›
official ★
W
Isiah Jones
TKO 1/6 · Alamodome, San Antonio, 🇺🇸
Williams 6-0-0 · Jones —
2020-12-19 ›
official ★
W
Esau Herrera de la Cruz
TKO 5/6 · Gimnasio TV Azteca, Mexico City, 🇲🇽
Williams 5-0-0 · Cruz —
2020-10-23 ›
✓ one source
W
Donald Sanchez
TKO 4/6 · Meridian at Island Gardens, Miami, Florida, 🇺🇸
Williams 4-0-0 · Sanchez —
2020-01-30 ›
✓ one source
W
Miroslav Juna
PTS 4/4 · The O2 Arena, London, 🇬🇧
Williams 3-0-0 · Juna —
2019-10-26 ›
✓ one source
Show all 23 bouts
W
Jabrandon Harris
KO 1/4 · College Park Center, Arlington, 🇺🇸
Williams 2-0-0 · Harris —
2019-07-27 ›
official ★
W
Quadeer Jenkins
TKO 1/4 · Madison Square Garden, New York City, New York, 🇺🇸
Williams 1-0-0 · Jenkins —
2019-06-01 ›
✓ one source
W
Joel Guevara
KO 1/4 · The Forum, Inglewood, California, 🇺🇸
Williams 0-0-0 · Guevara —
2019-04-26 ›
official ★

Ratings now

22
WBC · Middleweight
as of 2026-10-01

World titles

No world title reigns recorded.

Facts

What is Austin Williams's record?
Austin Williams's professional record is 20-3-0 with 13 knockouts.
When is Austin Williams's next fight?
No next fight is confirmed as of 17 Oct 2026.
Who did Austin Williams fight last?
Austin Williams last fought Vito Mielnicki Jr. on Sep 4, 2026 and lost by UD over 10 rounds.

Promoter

Matchroom Boxing

Sources

Boxerbook ID 3625 · permanent link boxerbook.com/id/3625. Wikidata (CC0), English Wikipedia (CC BY-SA), publisher rankings. Last fetched: 2026-10-11. Spot a mistake? Every bout page has a link to report it.

Wikipedia ↗Wikidata ↗