Middleweight

Jonas Sylvain

0-1-0 0 KO · 2026

Updated · Sources: English Wikipedia

Jonas Sylvain is a middleweight boxer. Record 0-1-0 with 0 knockouts in 2026. Jonas Sylvain last fought Amir Anderson on Jun 19, 2026 and lost by UD over 10 rounds.

Born—
Country—
DebutJun 19, 2026
Career2026
Rounds boxed10
Boxerbook rating1413 ± 287Why here ›
Confirmed bouts0 of 1

Record and next fight

Record
0-1-0, 0 KOs · 2026
Next fight
No next fight confirmed

Last result

L
Amir Anderson 🇺🇸
For vacant WBC US Silver middleweight title
UD 10/10 · Thunder Studios, Long Beach, California, 🇺🇸
2026-06-19 ›
✓ one source

The record

1 bouts, 2026, newest first. Records under each bout are both boxers going in.

Record compiled by Boxerbook from fight records

L
Amir Anderson 🇺🇸
For vacant WBC US Silver middleweight title
UD 10/10 · Thunder Studios, Long Beach, California, 🇺🇸
Sylvain 0-0-0 · Anderson 7-0-0
2026-06-19 ›
✓ one source

From broadcasts

Jun 19, 2026 · vs Amir Anderson

Weighed in officially at 159 pounds. Professional record of nine victories, no defeats with one bout even. Fighting out of and representing Boynton Beach, Florida. Sylvain is undefeated. Five of his victories coming by way of KO. Sylvain is a highly aggressive fighter. Sylvain is tough and has not taken many back steps in the fight. Over half of Sylvain's fights have ended by knockout. Sylvain is tough as nails.

Quotes (9)
“He weighed in officially at an even 159 lb.”
“His professional record, nine victories, no defeats with one bout even.”
“Fighting out of and representing Boynton Beach, Florida, presenting Joe Harris Silveira.”
“when a young guy undefeated believes in himself”
“Five of his victories coming by way of KO.”
“take a highly aggressive fighter like Jonas Sylvein”
“He hasn't taken a ton of back steps in this fight”
“Over half my fights have ended by way of knockout”
“This dude, Jonas Sylvain, is tough as nails”

Ratings now

Not in any current ranking.

World titles

No world title reigns recorded.

Facts

What is Jonas Sylvain's record?
Jonas Sylvain's professional record is 0-1-0 with 0 knockouts.
When is Jonas Sylvain's next fight?
No next fight is confirmed as of 23 Oct 2026.
Who did Jonas Sylvain fight last?
Jonas Sylvain last fought Amir Anderson on Jun 19, 2026 and lost by UD over 10 rounds.

Sources

Boxerbook ID 21893 · permanent link boxerbook.com/id/21893. Sources: fight records collected by Boxerbook (commissions, official results, press, bookmakers' cards). Spot a mistake? Every bout page has a link to report it.

No external links.