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Kill The Body

and the head will die

Billy Stephan vs Oscar Bonavena — record, stats and common opponents compared

Billy Stephan

🇦🇷HEAVYWEIGHT

Oscar Bonavena

Billy Stephan (1-1 across 2 tracked bouts) and Oscar Bonavena (58-9-1) are compared on record, finishing method, activity, and common opponents on Kill The Body. The two have met once. They share 1 common opponent.

Stephan

Tracked record

1–1

counted from 2 bouts Kill The Body has ingested

Bonavena

58

Wins44 KO · 76%

9

Losses

1

Draw68 tracked bouts

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

Bonavena leads 1–0

Billy Stephan and Oscar Bonavena have met 1 time; Bonavena leads 1–0.

Billy Stephan and Oscar Bonavena have met 1 time; Bonavena leads 1–0.
Met1964Dec 18Series
Billy StephanFighter ALLost0–1W–L
Oscar BonavenaFighter BWWon1–0W–L
ResultTKOR61Meeting

The Numbers

Stephan 0 · Bonavena 5 of 5 measurable rows
StephanBonavena
Record†
1-158-9-1 (edge)
Win %0–100%
50%
86% (edge)
Wins by knockoutmax 44
0
44 (edge)
KO ratenot comparable
—75.86%
Stoppage rate (tracked wins)‡0–100%
0%
76% (edge)
Times stopped‡levelmax 1
1
1
Title reignslevelmax 0
0
0
Bouts per year§max 5.6
1.6
5.6 (edge)
Bouts trackedcoveragemax 68
2
68

† 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
Billy Stephan: No date of birth
Oscar Bonavena: Died aged 33
Stance
Billy Stephan: Not recorded
Oscar Bonavena: Orthodox

Billy Stephan left, Oscar Bonavena right, as everywhere on this page. Age is stated, not scored — neither age nor stance carries an edge.

How They Win

Tracked bouts only
Billy Stephan1 win · from 2 tracked bouts

Billy Stephan: 1 tracked win — 1 on the cards (100%). Counted from 2 bouts Kill The Body has ingested.

1 on the cards 100%

Oscar Bonavena58 wins · from 68 tracked bouts

Oscar Bonavena: 58 tracked wins — 44 by KO/TKO (76%), 13 on the cards (22%) and 1 by another method or unrecorded (2%). Counted from 68 bouts Kill The Body has ingested.

44 by KO/TKO 76%13 on the cards 22%1 by another method or unrecorded 2%

One square per tracked win. Counted from the bouts Kill The Body has ingested for each fighter — Billy Stephan 2, Oscar Bonavena 68 — not from a career-complete method table.

Common Opponents

1 shared

1 shared · even on 1

Stephan

Opponent

Bonavena

  • Billy Stephan

    Win, PTS

    1963

    GrupeEven

    Oscar Bonavena

    Win, TKO 3

    1969

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

Billy Stephan last boxed on Dec 18, 1964 — 22,586 days ago. Stephan had won one in a row before losing by stoppage to Oscar Bonavena.WL

Grupe Sep 1963Bonavena Dec 19641.6 tracked bouts per year

Oscar Bonavena has won seven straight, the most recent against Billy Joiner. Bonavena last boxed on Feb 26, 1976.WWWWW

Mashburn Sep 1974Wright Oct 1974Vaka Nov 1974Gorosito Nov 1975Joiner Feb 19765.6 tracked bouts per year

Common Questions

With the rows behind them
Have Billy Stephan and Oscar Bonavena ever fought each other?
Yes. Billy Stephan and Oscar Bonavena met once on December 18, 1964, and Oscar Bonavena won by TKO in round 6.
The meeting

LDec 18, 1964 · Bonavena · TKO R6

Head to Head ↓
Who has the better record, Stephan or Bonavena?
Billy Stephan is 1-1 across the 2 bouts Kill The Body has tracked and Oscar Bonavena is 58-9-1. Oscar Bonavena has the higher win percentage. Records shown as tracked have not yet been independently verified as complete career totals.
Records · win %

Stephan1–150%

Bonavena58–9–186%

The Numbers ↓
Who has more knockouts, Stephan or Bonavena?
Billy Stephan has 0 knockout wins and Oscar Bonavena has 44. Oscar Bonavena has more.
Knockout wins · KO rate

Stephan0

Bonavena4475.9%

The Numbers ↓
Do Stephan and Bonavena have any common opponents?
Billy Stephan and Oscar Bonavena share 1 common opponent: Norbert Grupe. Neither fighter fared better across the shared opponents overall.
Shared opponent

Norbert GrupeWW

Common Opponents ↓
How much fight data does Kill The Body have on Stephan and Bonavena?
This comparison is drawn from 2 bouts tracked for Billy Stephan and 68 bouts tracked for Oscar Bonavena. Method and activity splits reflect those bouts only.
Bouts tracked · no edge

Stephan2bouts

Bonavena68bouts

How They Win ↓

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