Have Bill Brennan and Jack Dempsey ever fought each other?

Yes. Bill Brennan and Jack Dempsey have met 2 times and Jack Dempsey leads the series 2-0.

Who has the better record, Brennan or Dempsey?

Bill Brennan is 77-18-8 and Jack Dempsey is 68-6-10. Jack Dempsey has the higher win percentage.

Who has more knockouts, Brennan or Dempsey?

Bill Brennan has 49 knockout wins and Jack Dempsey has 53. Jack Dempsey has more.

Do Brennan and Dempsey have any common opponents?

Bill Brennan and Jack Dempsey share 3 common opponents: Billy Miske, Luis Ángel Firpo and Battling Levinsky. Jack Dempsey fared better against 3 of them.

How much fight data does Kill The Body have on Brennan and Dempsey?

This comparison is drawn from 15 bouts tracked for Bill Brennan and 85 bouts tracked for Jack Dempsey. Method and activity splits reflect those bouts only.

Bill Brennan vs Jack Dempsey — Records, Stats & Common Opponents

🇺🇸HEAVYWEIGHT

Jack Dempsey

Bill Brennan (77-18-8) and Jack Dempsey (68-6-10) are compared on record, finishing method, activity, and common opponents on Kill The Body. The two have met 2 times. They share 3 common opponents.

Brennan

Wins49 KO · 64%

Losses

Draws15 tracked bouts

Dempsey

Wins53 KO · 78%

Losses

Draws85 tracked bouts

Head to Head

Dempsey leads 2–0

Bill Brennan and Jack Dempsey have met 2 times; Dempsey leads 2–0.
Met	1918Feb 25	1920Dec 14	Series
Bill BrennanFighter A	LLost	LLost	0–2W–L
Jack DempseyFighter B	WWon	WWon	2–0W–L
Result	TKOR6Dempsey vs Brennan	KOR12Dempsey vs Brennan	2Meetings

The Numbers

Brennan 0 · Dempsey 8 of 8 measurable rows

BrennanEdge = longer wingDempsey

Record: 77-18-868-6-10 (edge)
Win %0–100%: 78.6%
86.9% (edge)
Wins by knockoutmax 53: 49
53 (edge)
KO rate0–100%: 63.64%
77.94% (edge)
Stoppage rate (tracked wins)^†0–100%: 0%
79% (edge)
Times stopped^†max 4: 4
1 (edge)
Title reignsmax 2: 0
2 (edge)
Bouts per year^‡max 6.5: 2.5
6.5 (edge)
Bouts trackedcoveragemax 85: 15
85

† 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

HeightLevel: Bill Brennan: 6′1″; Jack Dempsey: 6′1″
Reachnot held: Bill Brennan: No reach on file; Jack Dempsey: 73″
Agenot comparable: Bill Brennan: Died aged 30; Jack Dempsey: Died aged 87
Stance: Bill Brennan: Not recorded; Jack Dempsey: Orthodox

Bill Brennan left, Jack Dempsey right, as everywhere on this page. Age is stated, not scored — neither age nor stance carries an edge.

How They Win

Tracked bouts only

Bill Brennan1 win · from 15 tracked bouts

1 on the cards 100%

Jack Dempsey68 wins · from 85 tracked bouts

54 by KO/TKO 79%9 on the cards 13%5 by another method or unrecorded 7%

One square per tracked win. Counted from the bouts Kill The Body has ingested for each fighter — Bill Brennan 15, Jack Dempsey 85 — not from a career-complete method table.

Common Opponents

3 shared

3 shared · Dempsey better on 33 shared · Jack Dempsey better on 3

BrennanBill Brennan

Opponent

DempseyJack Dempsey

Bill Brennan
0–3–1 against
Loss, KO 4
1923Nov 1923
Loss, NWS
1921Jun 1921
Draw, NWS
1919Jun 1919
Loss, PTS
1919Apr 1919
MiskeBilly MiskeUnited States 74–13–16 · Light HeavyweightDempsey betterJack Dempsey better — 2–0–1 to 0–3–1
Jack Dempsey
2–0–1 against
Win, KO 3
1920Sep 1920
Win, NWS
1918Nov 1918
Draw, NWS
1918May 1918
Bill Brennan
Loss, KO 12
1923Mar 1923
FirpoLuis Ángel FirpoArgentina 31–4Dempsey betterJack Dempsey better — 1–0 to 0–1
Jack Dempsey
Win, KO 2
1923Sep 1923
Bill Brennan
1–1–2 against
Draw, PTS
1918Jan 1918
Loss, PTS
1917Nov 1917
Win, PTS
1917Oct 1917
Draw, PTS
1917Oct 1917
LevinskyBattling LevinskyUnited States 196–55–38 · Light HeavyweightDempsey betterJack Dempsey better — 1–0 to 1–1–2
Jack Dempsey
Win, KO 3
1918Nov 1918

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

Bill Brennan has lost six straight. Brennan last boxed on Nov 7, 1923.LLLLL

Greb Aug 1919Dempsey Dec 1920Miske Jun 1921Firpo Mar 1923Miske Nov 19232.5 tracked bouts per year

Jack Dempsey had won one in a row before losing a decision to Gene Tunney. Dempsey last boxed on Sep 22, 1927.WWLWL

Gibbons Jul 1923Firpo Sep 1923Tunney Sep 1926Sharkey Jul 1927Tunney Sep 19276.5 tracked bouts per year

Common Questions

With the rows behind them

Have Bill Brennan and Jack Dempsey ever fought each other?: Yes. Bill Brennan and Jack Dempsey have met 2 times and Jack Dempsey leads the series 2-0.
Who has the better record, Brennan or Dempsey?: Bill Brennan is 77-18-8 and Jack Dempsey is 68-6-10. Jack Dempsey has the higher win percentage.
Who has more knockouts, Brennan or Dempsey?: Bill Brennan has 49 knockout wins and Jack Dempsey has 53. Jack Dempsey has more.
Do Brennan and Dempsey have any common opponents?: Bill Brennan and Jack Dempsey share 3 common opponents: Billy Miske, Luis Ángel Firpo and Battling Levinsky. Jack Dempsey fared better against 3 of them.
How much fight data does Kill The Body have on Brennan and Dempsey?: This comparison is drawn from 15 bouts tracked for Bill Brennan and 85 bouts tracked for Jack Dempsey. Method and activity splits reflect those bouts only.

Compare someone else

6 suggested matchups

Compare Brennan with…

Compare Dempsey with…

Someone else?

Release either fighter to put someone new in that slot — the other one stays put.

Bill Brennan vs Jack Dempsey — record, stats and common opponents compared

Bill Brennan

Jack Dempsey