Have Cosme Rivera and Roberto Valenzuela Jr. ever fought each other?

Yes. Cosme Rivera and Roberto Valenzuela Jr. met once on January 30, 2021, and Roberto Valenzuela Jr. won by TKO in round 4.

Who has the better record, Rivera or Jr.?

Cosme Rivera is 43-40-4 and Roberto Valenzuela Jr. is 1-21 across the 22 bouts Kill The Body has tracked. Cosme Rivera has the higher win percentage. Records shown as tracked have not yet been independently verified as complete career totals.

Who has more knockouts, Rivera or Jr.?

Cosme Rivera has 29 knockout wins and Roberto Valenzuela Jr. has 1. Cosme Rivera has more.

Do Rivera and Jr. have any common opponents?

Cosme Rivera and Roberto Valenzuela Jr. share 1 common opponent: Andre Berto. Neither fighter fared better across the shared opponents overall.

How much fight data does Kill The Body have on Rivera and Jr.?

This comparison is drawn from 88 bouts tracked for Cosme Rivera and 22 bouts tracked for Roberto Valenzuela Jr.. Method and activity splits reflect those bouts only.

Cosme Rivera vs Roberto Valenzuela Jr. — Records, Stats & Common Opponents

🇲🇽SUPER LIGHTWEIGHT, WELTERWEIGHT

Cosme Rivera

Roberto Valenzuela Jr.

Cosme Rivera (43-40-4) and Roberto Valenzuela Jr. (1-21 across 22 tracked bouts) are compared on record, finishing method, activity, and common opponents on Kill The Body. The two have met once. They share 1 common opponent.

Rivera

Wins29 KO · 67%

Losses

Draws88 tracked bouts

Jr.

Tracked record

1–21

counted from 22 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

Cosme Rivera and Roberto Valenzuela Jr. have met 1 time; Jr. leads 1–0.
Met	2021Jan 30	Series
Cosme RiveraFighter A	LLost	0–1W–L
Roberto Valenzuela Jr.Fighter B	WWon	1–0W–L
Result	TKOR4Rivera vs Valenzuela Jr.	1Meeting

Rivera vs Valenzuela Jr. · Jan 30, 2021

The Numbers

Rivera 4 · Jr. 2 of 6 measurable rows

RiveraEdge = longer wingJr.

Record^†: 43-40-4 (edge)1-21
Win %0–100%: 51.7% (edge)
4.5%
Wins by knockoutmax 29: 29 (edge)
1
KO ratenot comparable: 67.44%—
Stoppage rate (tracked wins)^‡0–100%: 67%
100% (edge)
Times stopped^‡max 19: 19
14 (edge)
Title reignslevelmax 0: 0
0
Bouts per year^§max 2.7: 2.7 (edge)
0.8
Bouts trackedcoveragemax 88: 88
22

† 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

Agenot held: Cosme Rivera: 50; Roberto Valenzuela Jr.: No date of birth
Stance: Cosme Rivera: Orthodox; Roberto Valenzuela Jr.: Not recorded

Cosme Rivera left, Roberto Valenzuela 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

Cosme Rivera43 wins · from 88 tracked bouts

29 by KO/TKO 67%14 on the cards 33%

Roberto Valenzuela Jr.1 win · from 22 tracked bouts

1 by KO/TKO 100%

One square per tracked win. Counted from the bouts Kill The Body has ingested for each fighter — Cosme Rivera 88, Roberto Valenzuela Jr. 22 — not from a career-complete method table.

Common Opponents

1 shared

1 shared · even on 11 shared · even on 1

RiveraCosme Rivera

Opponent

Jr.Roberto Valenzuela Jr.

Cosme Rivera
Loss, UD
2007Jul 2007
BertoAndre BertoUnited States 32–6 · WelterweightEvenEven — 0–1 both
Roberto Valenzuela Jr.
Loss, TKO 1
2006Aug 2006

Both sides are set at the same size on purpose. Kill The Body does not score a second-round knockout above a split decision — the edge counts losses first and wins as the tiebreak, and the rest is yours to argue. Shared opponents are matched on fighter identity, not on name, so two different fighters with the same name never merge into one row.

Current Form

Oldest left · newest right

Cosme Rivera has lost two straight. Rivera last boxed on Jun 7, 2025 — 504 days ago.LLDLL

Carlson Feb 2022Macedo Mar 2022Chávez Oct 2022Angulo Nov 2022Sandoval Jun 20252.7 tracked bouts per year

Roberto Valenzuela Jr. last boxed on Sep 15, 2023 — 1,135 days ago. Jr. had lost three straight, after one straight win.LWLLL

Harrison May 2014Rivera Jan 2021Cissokho Mar 2022Murtazaliev Dec 2022Zayas Sep 20230.8 tracked bouts per year

Common Questions

With the rows behind them

Have Cosme Rivera and Roberto Valenzuela Jr. ever fought each other?: Yes. Cosme Rivera and Roberto Valenzuela Jr. met once on January 30, 2021, and Roberto Valenzuela Jr. won by TKO in round 4.
Who has the better record, Rivera or Jr.?: Cosme Rivera is 43-40-4 and Roberto Valenzuela Jr. is 1-21 across the 22 bouts Kill The Body has tracked. Cosme Rivera has the higher win percentage. Records shown as tracked have not yet been independently verified as complete career totals.
Who has more knockouts, Rivera or Jr.?: Cosme Rivera has 29 knockout wins and Roberto Valenzuela Jr. has 1. Cosme Rivera has more.
Do Rivera and Jr. have any common opponents?: Cosme Rivera and Roberto Valenzuela Jr. share 1 common opponent: Andre Berto. Neither fighter fared better across the shared opponents overall.
How much fight data does Kill The Body have on Rivera and Jr.?: This comparison is drawn from 88 bouts tracked for Cosme Rivera and 22 bouts tracked for Roberto Valenzuela Jr.. Method and activity splits reflect those bouts only.

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Cosme Rivera vs Roberto Valenzuela Jr. — record, stats and common opponents compared

Cosme Rivera

Roberto Valenzuela Jr.