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Kill The Body

and the head will die

Jonatan Romero vs Kenneth Mark Sims, Jr. — record, stats and common opponents compared

🇨🇴SUPER WELTERWEIGHT

Jonatan Romero

SUPER WELTERWEIGHT

Kenneth Mark Sims, Jr.

Jonatan Romero (35-5) and Kenneth Mark Sims, Jr. (3-1-1 across 5 tracked bouts) are compared on record, finishing method, activity, and common opponents on Kill The Body. The two have met once. They share no common opponents in Kill The Body's bout data.

Romero

35

Wins19 KO · 54%

5

Losses

0

Draws40 tracked bouts

Jr.

Tracked record

3–1–1

counted from 5 bouts Kill The Body has ingested

Heads up: at least one of these records is a tracked record — the wins and losses Kill The Body has ingested so far, not an independently verified career total. Treat the comparison as a read on the bouts we hold, not a settled ledger.

Head to Head

Jr. leads 1–0

Jonatan Romero and Kenneth Mark Sims, Jr. have met 1 time; Jr. leads 1–0.

Jonatan Romero and Kenneth Mark Sims, Jr. have met 1 time; Jr. leads 1–0.
Met2024Aug 10Series
Jonatan RomeroFighter ALLost0–1W–L
Kenneth Mark Sims, Jr.Fighter BWWon1–0W–L
How it endedTKO1Meeting

The Numbers

Romero 5 · Jr. 1 of 6 measurable rows
RomeroJr.
Record†
35-5 (edge)3-1-1
Win %0–100%
87.5% (edge)
70%
Wins by knockoutmax 19
19 (edge)
1
KO ratenot comparable
54.29%—
Stoppage rate (tracked wins)‡0–100%
54% (edge)
33%
Times stopped‡max 4
4
0 (edge)
Title reignslevelmax 0
0
0
Bouts per year§max 2.6
2.6 (edge)
0.7
Bouts trackedcoveragemax 40
40
5

† One or both records are tracked, not career-verified. · ‡ Counted from bouts Kill The Body has ingested, not a career total. · § Across each fighter's tracked career span. · Bars are scaled per row — percentages on 0–100, counts against the larger of the two. Every figure is also printed as text.

Tale of the Tape

Heightnot held
Jonatan Romero: 5′8″
Kenneth Mark Sims, Jr.: No height on file
Reachnot held
Jonatan Romero: 69″
Kenneth Mark Sims, Jr.: No reach on file
Agenot held
Jonatan Romero: 39
Kenneth Mark Sims, Jr.: No date of birth
Stance
Jonatan Romero: Orthodox
Kenneth Mark Sims, Jr.: Not recorded

Jonatan Romero left, Kenneth Mark Sims, Jr. right, as everywhere on this page. Age is stated, not scored — neither age nor stance carries an edge.

How They Win

Tracked bouts only
Jonatan Romero35 wins · from 40 tracked bouts

Jonatan Romero: 35 tracked wins — 19 by KO/TKO (54%) and 16 on the cards (46%). Counted from 40 bouts Kill The Body has ingested.

19 by KO/TKO 54%16 on the cards 46%

Kenneth Mark Sims, Jr.3 wins · from 5 tracked bouts

Kenneth Mark Sims, Jr.: 3 tracked wins — 1 by KO/TKO (33%) and 2 on the cards (67%). Counted from 5 bouts Kill The Body has ingested.

1 by KO/TKO 33%2 on the cards 67%

One square per tracked win. Counted from the bouts Kill The Body has ingested for each fighter — Jonatan Romero 40, Kenneth Mark Sims, Jr. 5 — not from a career-complete method table.

Common Opponents

No opponents in common across the bouts Kill The Body has tracked for these two.

Current Form

Oldest left · newest right

Jonatan Romero last boxed on Aug 10, 2024 — 771 days ago. Romero had lost four straight, after one straight win.WLLLL

Hernandez May 2022Nova Jul 2023Bell Mar 2024Jaimes Jul 2024Jr. Aug 20242.6 tracked bouts per year

Kenneth Mark Sims, Jr. had won three in a row before losing a decision to Arnold Barboza Jr.. Jr. last boxed on Mar 14, 2026 — 190 days ago.DWWWL

Love Jul 2018Rodriguez May 2021Gözgeç May 2023Preciado Aug 2024Jr. Mar 20260.7 tracked bouts per year

Common Questions

With the rows behind them
Have Jonatan Romero and Kenneth Mark Sims, Jr. ever fought each other?
Yes. Jonatan Romero and Kenneth Mark Sims, Jr. met once on August 10, 2024, and Kenneth Mark Sims, Jr. won by TKO.
The meeting

LAug 10, 2024 · Jr. · TKO

Head to Head ↓
Who has the better record, Romero or Jr.?
Jonatan Romero is 35-5 and Kenneth Mark Sims, Jr. is 3-1-1 across the 5 bouts Kill The Body has tracked. Jonatan Romero has the higher win percentage. Records shown as tracked have not yet been independently verified as complete career totals.
Records · win %

Romero35–587.5%

Jr.3–1–170%

The Numbers ↓
Who has more knockouts, Romero or Jr.?
Jonatan Romero has 19 knockout wins and Kenneth Mark Sims, Jr. has 1. Jonatan Romero has more.
Knockout wins · KO rate

Romero1954.3%

Jr.1

The Numbers ↓
Do Romero and Jr. have any common opponents?
Kill The Body's bout data shows no opponents that both Jonatan Romero and Kenneth Mark Sims, Jr. have faced.
How much fight data does Kill The Body have on Romero and Jr.?
This comparison is drawn from 40 bouts tracked for Jonatan Romero and 5 bouts tracked for Kenneth Mark Sims, Jr.. Method and activity splits reflect those bouts only.
Bouts tracked · no edge

Romero40bouts

Jr.5bouts

How They Win ↓

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