Have Harry Greb and Willie KO Brennan ever fought each other?

Yes. Harry Greb and Willie KO Brennan have met 3 times and Harry Greb leads the series 3-0.

Who has the better record, Greb or Brennan?

Harry Greb is 261-18-19 and Willie KO Brennan is 3-8-3 across the 14 bouts Kill The Body has tracked. Harry Greb has the higher win percentage. Records shown as tracked have not yet been independently verified as complete career totals.

Who has more knockouts, Greb or Brennan?

Harry Greb has 49 knockout wins and Willie KO Brennan has 0. Harry Greb has more.

Do Greb and Brennan have any common opponents?

Harry Greb and Willie KO Brennan share 5 common opponents: Tommy Gibbons, Mike Gibbons and Al McCoy (and 2 others). Harry Greb fared better against 3 of them.

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

This comparison is drawn from 299 bouts tracked for Harry Greb and 14 bouts tracked for Willie KO Brennan. Method and activity splits reflect those bouts only.

Harry Greb vs Willie KO Brennan — Records, Stats & Common Opponents

🇺🇸MIDDLEWEIGHT

Harry Greb

Willie KO Brennan

Harry Greb (261-18-19) and Willie KO Brennan (3-8-3 across 14 tracked bouts) are compared on record, finishing method, activity, and common opponents on Kill The Body. The two have met 3 times. They share 5 common opponents.

Greb

261

Wins49 KO · 19%

Losses

Draws299 tracked bouts

Brennan

Tracked record

3–8–3

counted from 14 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

Greb leads 3–0

Harry Greb and Willie KO Brennan have met 3 times; Greb leads 3–0.
Met	1916Nov 8	1916Nov 17	1917Feb 12	Series
Harry GrebFighter A	WWon	WWon	WWon	3–0W–L
Willie KO BrennanFighter B	LLost	LLost	LLost	0–3W–L
Result	NWSGreb vs Brennan	NWSGreb vs Brennan	NWSGreb vs Brennan	3Meetings

The Numbers

Greb 6 · Brennan 1 of 7 measurable rows

GrebEdge = longer wingBrennan

Record^†: 261-18-19 (edge)3-8-3
Win %0–100%: 90.8% (edge)
32.1%
Wins by knockoutmax 49: 49 (edge)
0
KO ratenot comparable: 18.77%—
Stoppage rate (tracked wins)^‡0–100%: 19% (edge)
0%
Times stopped^‡max 2: 2
0 (edge)
Title reignsmax 2: 2 (edge)
0
Bouts per year^§max 22.5: 22.5 (edge)
2.5
Bouts trackedcoveragemax 299: 299
14

† 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: Harry Greb: 5′8″; Willie KO Brennan: No height on file
Reachnot held: Harry Greb: 71″; Willie KO Brennan: No reach on file
Agenot held: Harry Greb: Died aged 32; Willie KO Brennan: No date of birth
Stance: Harry Greb: Orthodox; Willie KO Brennan: Not recorded

Harry Greb left, Willie KO Brennan right, as everywhere on this page. Age is stated, not scored — neither age nor stance carries an edge.

How They Win

Tracked bouts only

Harry Greb261 wins · from 299 tracked bouts

49 by KO/TKO 19%58 on the cards 22%154 by another method or unrecorded 59%

Willie KO Brennan3 wins · from 14 tracked bouts

1 on the cards 33%2 by another method or unrecorded 67%

One square per tracked win. Counted from the bouts Kill The Body has ingested for each fighter — Harry Greb 299, Willie KO Brennan 14 — not from a career-complete method table.

Common Opponents

5 shared

5 shared · Greb better on 3 · Brennan better on 25 shared · Harry Greb better on 3 · Willie KO Brennan better on 2

GrebHarry Greb

Opponent

BrennanWillie KO Brennan

Harry Greb
2–2 against
Win, UD
1922Mar 1922
Win, NWS
1920Jul 1920
Loss, NWS
1920May 1920
Loss, NWS
1915Nov 1915
GibbonsTommy GibbonsUnited States 96–5–4 · HeavyweightBrennan betterWillie KO Brennan better — 0–1 to 2–2
Willie KO Brennan
Loss, NWS
1913Sep 1913
Harry Greb
1–1 against
Win, NWS
1919Jun 1919
Loss, NWS
1917Feb 1917
GibbonsMike GibbonsUnited States 112–12–8Greb betterHarry Greb better — 1–1 to 0–2
Willie KO Brennan
0–2 against
Loss, NWS
1914Dec 1914
Loss, PTS
1912May 1912
Harry Greb
2–0 against
Win, PTS
1918May 1918
Win, NWS
1917Apr 1917
McCoyAl McCoyUnited States 76–49–34 · MiddleweightGreb betterHarry Greb better — 2–0 to 1–0–1
Willie KO Brennan
1–0–1 against
Win, NWS
1914Oct 1914
Draw, NWS
1913Oct 1913
Harry Greb
2–0 against
Win, NWS
1918Mar 1918
Win, NWS
1917Jul 1917
DillonJack DillonUnited States 191–31–28 · Light HeavyweightGreb betterHarry Greb better — 2–0 to 0–1
Willie KO Brennan
Loss, NWS
1913Mar 1913
Harry Greb
2–1–1 against
Win, PTS
1917Nov 1917
Win, NWS
1917May 1917
Loss, NWS
1916Jun 1916
Draw, NWS
1915Oct 1915
ChipGeorge ChipLithuania 77–67–16Brennan betterWillie KO Brennan better — 1–0–1 to 2–1–1
Willie KO Brennan
1–0–1 against
Win, NWS
1915Dec 1915
Draw, NWS
1912Dec 1912

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

Harry Greb had won two in a row before losing a decision to Tiger Flowers. Greb last boxed on Aug 19, 1926.WLWWL

Phelps Feb 1926Flowers Feb 1926Weigand Jun 1926Gans Jun 1926Flowers Aug 192622.5 tracked bouts per year

Willie KO Brennan last boxed on Feb 12, 1917 — 40,062 days ago. Brennan had lost four straight.DLLLL

Lewis Jan 1916Britton Mar 1916Greb Nov 1916Greb Nov 1916Greb Feb 19172.5 tracked bouts per year

Common Questions

With the rows behind them

Have Harry Greb and Willie KO Brennan ever fought each other?: Yes. Harry Greb and Willie KO Brennan have met 3 times and Harry Greb leads the series 3-0.
Who has the better record, Greb or Brennan?: Harry Greb is 261-18-19 and Willie KO Brennan is 3-8-3 across the 14 bouts Kill The Body has tracked. Harry Greb has the higher win percentage. Records shown as tracked have not yet been independently verified as complete career totals.
Who has more knockouts, Greb or Brennan?: Harry Greb has 49 knockout wins and Willie KO Brennan has 0. Harry Greb has more.
Do Greb and Brennan have any common opponents?: Harry Greb and Willie KO Brennan share 5 common opponents: Tommy Gibbons, Mike Gibbons and Al McCoy (and 2 others). Harry Greb fared better against 3 of them.
How much fight data does Kill The Body have on Greb and Brennan?: This comparison is drawn from 299 bouts tracked for Harry Greb and 14 bouts tracked for Willie KO Brennan. Method and activity splits reflect those bouts only.

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Harry Greb vs Willie KO Brennan — record, stats and common opponents compared

Harry Greb

Willie KO Brennan