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Trainer profile

K F O'Brien

93 runners in the lifetime window · 19 individual horses
As at 22 Oct 2026 · KTB archive: 2005–present, updated daily
Last runner Feb 2011
Last 5 seasons Lifetime (2008→)
No runners in the last 5 seasons — showing the lifetime record, from 1 Jan 2008 — the aggregate floor: every horse in the window has a complete captured career behind it.
9–93
Wins / Runs
9.7%
Strike rate
n=93
25 (27%)
Placed
1.37
Fair A/E
n=93 · 1.00 incl. margin
−16.75
£1 level stake
n=93 at SP · −18.0%
£107k
Prize money (window)
Strike by season
0%
KTB at a glance Claiming riders: 12.8%

Yard patterns

the angles behind the record · vs 9.7% baseline
Fresh · 61+ days off
11.1%+1.4
n=18 · A/E 1.92 · £1 +9.00
New recruits · first run for the yard
0%−9.7
n=3 · A/E 0.00 · £1 −3.00
Debutants · first career start
0%−9.7
n=8 · A/E 0.00 · £1 −8.00
First-time headgear · true-first definition
0%−9.7
n=10 · A/E 0.00 · £1 −10.00
Headgear returns · back on after a bare run
0%−9.7
n=2 · A/E 0.00 · £1 −2.00
When favourite
0%
n=2 · A/E 0.00 · £1 −2.00
Claiming riders · a claimer in the saddle
12.8%+3.1
n=47 · A/E 1.86 · £1 +5.25
Group / Graded races · pattern & listed
0%−9.7
n=5 · A/E 0.00 · £1 −5.00

Each tile is the record in that situation vs the 9.7% baseline — descriptive splits with the sample always shown, not tips. Tiles under 30 runs render muted. Headgear figures use the true-first definition (first gear appearance in the captured career); returns are gear back on after a bare run. Claiming riders are runs where the booked rider carried a weight claim. Group / Graded covers pattern and listed races.

Notable angles

vs their own baseline
With horses switching code 19.4% vs 9.7% · n=31
Over 1m5f – 2m 14.3% vs 9.7% · n=42
With claiming riders up 12.8% vs 9.7% · n=47
Over 2m1f – 2m4f 6.3% vs 9.7% · n=32
With a new jockey booking 6.9% vs 9.7% · n=58
In Hurdle races 9.6% vs 9.7% · n=52 · A/E 1.39
Descriptive splits ranked by divergence × sample — insight, not instruction. Every angle carries its N; nothing under 30 runs qualifies. Rows within 2pts of the baseline appear only when the market-relative read (Fair A/E) diverges, and show it.

Record by conditions

same window as header

Race type

TypeRWSR£1
Hurdle 52 5 9.6% −15.50
Flat 24 3 12.5% −5.25
NH Flat 14 1 7.1% +7.00
Chase 3 0 0% −3.00

Going

GoingRWSR£1
Good 25 1 4% −19.00
Soft 22 3 13.6% +11.00
Heavy 16 2 12.5% +0.75
Good to Soft 14 1 7.1% −9.00
Good to Firm 11 1 9.1% −2.00
Firm 3 1 33.3% +3.50
Standard (AW) 2 0 0% −2.00

Courses

CourseRWSR£1
Kilbeggan 9 0 0% −9.00
Punchestown 9 0 0% −9.00
Bellewstown 7 1 14.3% −1.00
Killarney 7 1 14.3% −3.25
Tramore 6 2 33.3% +8.00
Limerick 6 1 16.7% +7.00
Listowel 6 2 33.3% +6.00
Downpatrick 5 0 0% −5.00
Fairyhouse 5 0 0% −5.00
Thurles 4 0 0% −4.00
Navan 4 0 0% −4.00
Naas 4 0 0% −4.00
Roscommon 3 1 33.3% +3.50
Dundalk (AW) 2 0 0% −2.00
Tipperary 2 0 0% −2.00

Class

ClassRWSR£1
Class 1 5 0 0% −5.00

Market position

In the bettingRWSRA/E£1
Favourite 4 1 25% 0.94 −0.25
2nd–3rd fav 20 6 30% 2.26 +18.50
4th–6th fav 17 0 0% 0.00 −17.00
7th+ in betting 52 2 3.8% 1.14 −18.00
Fair A/E per band is the tell: near 1.00 the market had it priced right; well above, the wins came where the market didn't expect them.

Rows below n=30 are shown faded — a small sample is a fact, not a trend. Every figure carries its N.

Jumping record

completion over obstacles · same window as header
96.4% completed · 55 obstacle runners (chases & hurdles)
CodeRCompFURPUBDOth
Chase 3 100% 0 0 0 0 0
Hurdle 52 96.2% 1 0 1 0 0
Chases and hurdles only — bumpers have no obstacles, so completion is not a question there. F fell · UR unseated rider · PU pulled up · BD brought down · Oth covers refusals, slip-ups, run-outs and the rare disqualification. Non-runners are excluded throughout. Rows under n=30 are shown faded. A descriptive record, not a tip.

Horses trained

same window as header · most-raced first
HorseRWPlLast ran
Fingers (GB) 20 7 11 15 Oct 09
Clu Agus Cail (IRE)then Alison Batchelor 11 0 5 13 Sep 10
Unique Moment (GB)from Dominic Ffrench Davis 8 0 0 31 May 09
Posh Lady (IRE)from John M Oxx · then I R Ferguson 8 0 2 17 Jul 08
Stylish Article (IRE) 6 0 1 23 Nov 08
Precept (GB)from Henry Candy 6 0 1 20 Sep 08
On Borrowed Wings (IRE)then Alan Fleming 5 2 4 14 Sep 09
Menfromallover (IRE)then Ben Pollock 5 0 0 26 Jun 08
Cloch Mor (IRE)then David M O'Brien 4 0 0 10 Feb 11
Inasus (GER)from Mark Johnston 4 0 1 3 May 08
The Jk's Pride (IRE)then Stephen Michael Cox 3 0 0 20 Oct 08
Georgina's Luck (IRE) 3 0 0 29 May 08
All 19 horses sent out in this window. Runs, wins and places only: a strike rate or a return on a handful of runs is noise, so none is quoted per horse — each horse's full record is on its own page.
Where they came from · where they went next

Of the 19 horses listed, 5 arrived from another yard in our archive; 14 had their first archived run for this yard.

8 have since run for another yard; 11 have no later run for another yard in our archive.

Read from each listed horse's whole archived career (2005 onwards), not only this window, and counted over the horses listed above, not the whole string. “First archived run” means our archive holds nothing earlier, not that the horse was unraced. A horse with no later run elsewhere may still be here, be off the track, or have run somewhere our archive does not cover — none of that is asserted.

When the yard fires

strike by month, lifetime
JFMAMJJASOND
0000141371338000
A jumps yard: the season runs Oct–Apr. Muted months are small samples (under 30 runs) — read them with the caution they deserve.

Jockey bookings

same window · biggest samples first
RiderRWSR£1
John Cullen 12 2 16.7% +7.00
Miss A O'Brien 11 3 27.3% +7.75
Willie Supple 6 0 0% −6.00
Mr G O'Sullivan 6 1 16.7% +15.00
A B Joyce 6 0 0% −6.00
Davy Russell 5 0 0% −5.00
L McNiff 4 2 50% +8.50
A E Lynch 3 0 0% −3.00
Mr R P Quinlan 3 0 0% −3.00
P W Flood 3 0 0% −3.00
Tommy Treacy 3 0 0% −3.00
Chris Hayes 2 0 0% −2.00
Muted rows are under 30 rides.

Career highlights

lifetime archive, 2005→
20
Archived wins
1
Pattern / graded wins
£281k
Prize money
2009
Best season · 8 wins
In our archive from its very first year (2005), so this career almost certainly began earlier than our record does. The figures above count 2005 onwards only — what the archive holds, not a full-career total. This card is the full archive census (2005→); the statistics in the header aggregate from 2008 — the floor that guarantees every horse a complete captured career — so this card can legitimately show more wins than the header.
Duty (IRE) — Aramark Winning Fair Juvenile Hurdle (Grade 3) Fairyhouse · Feb 2007 · Grade 3
£22,785
Fingers (GB) — Seamus Mulvaney Crockafotha Handicap Hurdle Bellewstown · Jul 2009
£15,950
Fingers (GB) — Listowel Races Supporters Club Slan Abhaile (q.r.) Race Listowel · Sep 2009
£13,475
Notable horses
Fingers (GB) Miss Mason (IRE) Our Monty (IRE) Duty (IRE) On Borrowed Wings (IRE) Unique Moment (GB)

Sires in the string

progeny record · win % by ground and trip
Fraam (GB) 35% · 7–20
Progeny have won 9.3% of 2,027 runs since 2008 (136 horses).
Rock Of Gibraltar (IRE) 0% · 0–11
Progeny have won 9.8% of 11,563 runs since 2008 (871 horses).
Peintre Celebre (USA) 0% · 0–8
Progeny have won 11.8% of 2,836 runs since 2008 (311 horses). Weakest on Standard (AW) going: 8.3% from 734. Weakest over 6f – 7f (all codes): 8.2% from 291.
Vettori (IRE) 0% · 0–8
Progeny have won 7.2% of 1,775 runs since 2008 (163 horses).
Polish Precedent (USA) 0% · 0–6
Progeny have won 7.3% of 838 runs since 2008 (80 horses). Strongest over 2m1f – 2m4f (all codes): 11% from 145.
Vestris Abu (GB) 0% · 0–6
Progeny have won 0% of 19 runs since 2008 (5 horses). A small sample.
Top line: the yard's own record with each sire's runners (win %, wins–runs), same window as the header; faded under 30 runs. Beneath it: every run by that sire's progeny in our archive since 2008, as at 22 Oct 2026 — what they have done, not a forecast. A going or a distance is named only where at least 100 progeny runs sit 3 or more points from the sire's own win rate. Distance bands cover Flat and jumps together.

The record

latest 50 of 323 · newest first

The latest 50 of 323 archived runners, newest first. The full record runs from 22 January 2005 to 10 February 2011.

DateCourseHorseRaceFinishSP
10 Feb 11 Thurles Cloch Mor (IRE)J: Ken Whelan Holy Cross Maiden Hurdle16f · Heavy · 18 ran 14th 66/1
08 Jan 11 Punchestown Cloch Mor (IRE)J: Ken Whelan I.N.H. Stallion Owners European Breeders Fund Maiden Hurdle (Div 1)16f · Heavy · 13 ran 12th 20/1
13 Sep 10 Listowel Clu Agus Cail (IRE)J: A P Heskin Ladbrokes Ireland Handicap Hurdle (81-109)16f · Good · 17 ran 5th 14/1
03 Sep 10 Kilbeggan Clu Agus Cail (IRE)J: A P Heskin Midland Breeders Supporting Kilbeggan E.B.F. Mares Hurdle16f · Firm · 8 ran 3rd 5/1
20 Aug 10 Kilbeggan Clu Agus Cail (IRE)J: John Cullen Pat Doyle Memorial Mares Novice Hurdle19f · Good · 16 ran 3rd 6/1
07 Aug 10 Kilbeggan Clu Agus Cail (IRE)J: John Cullen 'larcc Cancer Support Centre' Mares Maiden Hurdle19f · Good To Yielding · 15 ran 2nd 15/2
22 Jul 10 Limerick Clu Agus Cail (IRE)J: John Cullen Greenmount Conference Centre Mares Maiden Hurdle20f · Good To Yielding · 18 ran 3rd 8/1
06 Jul 10 Roscommon Hangedmansqueen (IRE)J: B J Cooper Bet On-course With Tote Maiden Hurdle20f · Good To Firm · 16 ran PU 25/1
20 Jun 10 Gowran Park Clu Agus Cail (IRE)J: A E Lynch Goresbridge Maiden Hurdle18f · Good To Firm · 20 ran 4th 12/1
05 Jun 10 Listowel Clu Agus Cail (IRE)J: Patrick Mangan Listowel Writers Week Mares Hurdle16f · Good To Firm · 10 ran 5th 18/1
19 May 10 Sligo Cloch Mor (IRE)J: Mr R P Quinlan Cleveragh Flat Race16f · Good · 10 ran 5th 25/1
15 May 10 Kilbeggan Clu Agus Cail (IRE)J: A E Lynch I.c.a. Centenary Celebration Maiden Hurdle19f · Good To Firm · 14 ran 3rd 16/1
23 Apr 10 Punchestown Rambling Oscar (IRE)J: Mr R P Quinlan Betchronicle.com (pro/am) Flat Race18f · Good · 24 ran 22nd 50/1
20 Apr 10 Punchestown Cloch Mor (IRE)J: Mr R P Quinlan Goffs Land Rover Bumper16f · Good · 20 ran 15th 33/1
17 Apr 10 Tramore Clu Agus Cail (IRE)J: Miss A O'Brien Saltan Properties (mares) Flat Race16f · Good To Firm · 15 ran 6th 20/1
25 Mar 10 Thurles Rambling Oscar (IRE)J: Mr R O Harding Littleton Flat Race16f · Soft To Heavy · 14 ran 14th 20/1
22 Nov 09 Navan Clu Agus Cail (IRE)J: Mr G O'Sullivan ITBA Fillies Scheme E.B.F. (Pro/Am) Mares Flat Race (Listed)16f · Heavy · 17 ran 13th 33/1
05 Nov 09 Thurles Clu Agus Cail (IRE)J: Miss A O'Brien Toboradora Flat Race16f · Soft · 9 ran 5th 25/1
15 Oct 09 Punchestown Fingers (GB)J: John Cullen Ryan's Cleaning Events Specialists Hurdle (listed)16f · Good To Yielding · 6 ran 4th 12/1
19 Sep 09 Listowel Fingers (GB)J: Miss A O'Brien Listowel Races Supporters Club Slan Abhaile (q.r.) Race14f · Good · 13 ran 1st 5/1

Drawn from the whole archive (2005 onwards), so it can include runs outside the window the header statistics cover. Non-runners are not listed. A finish shown in letters is a non-completion (F fell · UR unseated · PU pulled up · BD brought down).

Quick answers

What is K F O'Brien's strike rate?
K F O'Brien has won 9 of 93 runners since 2008, a strike rate of 9.7% (as at 22 October 2026). Figures are computed from our own results archive.
What is K F O'Brien's Fair A/E?
1.37, from 93 runners with a computed fair probability since 2008. Fair A/E compares actual wins with a margin-stripped market expectation, so 1.00 is par: above it the wins came at bigger prices than the margin-free market implied, below it they did not.
Fair A/E compares wins with a margin-stripped market expectation. Favourite-heavy samples — top yards, leading riders — naturally read a few points warm, so 1.05 means "beat the margin-free market read", not "the market underrates this by 5%". Three sample sizes are reported and never blended: runs (n), the ROI basis (n at SP), and the fair-A/E basis (n with a computed fair probability).

Strike rate is wins over all runs (n). ROI is £1 level stakes at SP over runs with a parseable price (n at SP). Fair A/E is wins over margin-stripped market expectation, over runs with a computed fair probability (n fair). The three Ns can legitimately differ and are always shown. Figures as at 22 October 2026, computed from our own results archive (2005 onwards; aggregates from 2008).