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Horse profile

Diamond Duke (IRE)

6yo gelding (at last run, Jan 2025) · Last trainer Terence O'Brien · Last owner Andy Mahon Kieran Evans
by Diamond Boy (FR) out of Damefirth (IRE) (Flemensfirth)
6 runs · 6 courses · from Apr 2024
As at 27 Oct 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
No run recorded since 12 Jan 2025 — 653 days ago. Our archive can't say whether the horse is still in training.
Last run Jan 2025 · 5th of 11 Headgear returns LTO
KTB Profile

Diamond Duke is a gelding by Diamond Boy out of a Flemensfirth mare who failed to win in six starts on turf between Apr 2024 and Jan 2025. He raced three times over 2m1f to 2m4f and three times over 2m5f to 3m, with three runs on soft ground and three on good. His highest official rating was 95. He finished fifth of 11 in the Sky Bet Build A Bet Beginners Chase at Punchestown in Jan 2025, where headgear returned.

Based on 6 archived runs · run-style from 2 commented runs since Nov 2024 · updated 27 Oct 2026

KTB Speed and Rating

KTB Speed

Best recent Speed 57 the best of the last 1 graded (A or B) run · Cork, 11 May 2024

How fast the horse ran, as points against the day-corrected standard time for its course and distance: 100 is the median GB Class 4 handicap winner on that code; one point is 0.1% of the standard time. A, B or C is how much the day's card could tell us, not how good the run was. What this means →

Jumps 6 figures · best 114C · median 84
GoingRunsBestMedianSince 27 Oct 2025
Soft3114C85—
Good395C57—
DistanceRunsBestMedianSince 27 Oct 2025
2m5f – 3m3114C85—
2m1f – 2m4f395C83—

KTB Speed v1 · batch 15 Sep 2026 · GB & Irish racing only · 6 figures from 6 runs · as at 3 Oct 2026 · a record, not a forecast

KTB Rating

Best recent KTB Rating 92C the best of the last 3 rated runs · Punchestown, 12 Jan 2025 Official rating 93 at the last run, 22 Nov 2024

What the horse achieved in each race, in pounds on the official-rating scale, from the weight carried, the lengths beaten and the race's own level solved across the archive — never the market, never the official rating as a starting point. The headline is the best of the horse's last three rated runs on that code. A, B or C on a run is how much known form was in that race. What this means →

Jumps 6 figures · best 98A · median 89.5
GoingRunsBestMedianSince 27 Oct 2025
Soft392C87—
Good398A94—
DistanceRunsBestMedianSince 27 Oct 2025
2m5f – 3m398A92—
2m1f – 2m4f394C86—

KTB Rating v1 · batch 3 Oct 2026 · GB & Irish racing only · 6 figures from 6 runs · as at 4 Oct 2026 · a record, not a forecast

Both figures are KTB's own, computed from the archive; no vendor rating enters either. Every run's figure is on its form line below with its grade. Grades measure how much the archive could see, never the merit of the run.

Pedigree intelligence

Sire

Progeny in our archive have won 12% of 2,279 runs since Jan 2008 (285 horses).

GoingRunsWinsSRvs sireThis horse
Good to Firm27829.6%+17.6—
Good6638012.1%+0.10 from 3
Good to Soft4815411.2%−0.8—
Soft7438010.8%−1.20 from 3
Heavy3485014.4%+2.4—
Standard (AW)1715.9%−6.1—
Distance (all codes)RunsWinsSRvs sireThis horse
6f – 7f700%−12—
1m – 1m1f1600%−12—
1m2f – 1m4f18211.1%−0.9—
1m5f – 2m84411213.3%+1.3—
2m1f – 2m4f98110510.7%−1.30 from 3
2m5f – 3m3574612.9%+0.90 from 3
Over 3m56814.3%+2.3—

Flat and jumps together (all codes) · since Jan 2008 · as at 27 Oct 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast

Dam
Damefirth (IRE) (Flemensfirth)

3 siblings in the archive, 2 winners — best of them Find A Fortune (IRE) (1 win).

The wins came over 2m1½f–2m4f.

ProduceRunsWinsWin tripsBest grade
Find A Fortune (IRE)1312m4f—
Nashville Notions (IRE)1312m1½f—
Downtown Nashville (IRE)40——

Record by conditions

GoingRunsWinsSR£1
Soft 3 0 0% −3.00
Good 3 0 0% −3.00

CourseRunsWinsSR£1
Punchestown 1 0 0% −1.00
Tipperary 1 0 0% −1.00
Killarney 1 0 0% −1.00
Listowel 1 0 0% −1.00
Cork 1 0 0% −1.00
Tramore 1 0 0% −1.00

DistanceRunsWinsSR£1
2m5f – 3m 3 0 0% −3.00
2m1f – 2m4f 3 0 0% −3.00

JockeyRunsWinsSR£1
John Shinnick 2 0 0% −2.00
Jake Coen 1 0 0% −1.00
Aidan Kelly 1 0 0% −1.00
Darragh O'Keeffe 1 0 0% −1.00
Gavin Brouder 1 0 0% −1.00

HeadgearRunsWinsSR£1
Tongue tie + cheekpieces 3 0 0% −3.00
None 2 0 0% −2.00
Blinkers 1 0 0% −1.00

SeasonRunsWinsSR£1
2025 1 0 0% −1.00
2024 5 0 0% −5.00

TypeRunsWinsSR£1
Hurdle 5 0 0% −5.00
Chase 1 0 0% −1.00

Splits include every sample, however small — muted rows are under 3 runs. A one-from-one record is a fact, not a trend: read the Runs column before the strike rate.

Form

DateCourseRace PosBtn Wgt ORSpdKTB Jockey SP
2025 · 1 run
12 Jan 25+51d Punchestown Sky Bet Build A Bet Beginners Chase 22.5f · Soft · 11 ran Sat close to the front pair early - fourth at halfway before stumbling at the 11th - driven but unable to find more from three out finishing fifth 5/11 12 11-7 —85C92C John Shinnick 150/1
2024 · 5 runs
22 Nov 24+127d Tipperary tipperaryraces Novice Handicap Hurdle (80-116) 20.5f · Soft · 15 ran Sat handy behind the front group early - up to 3rd 5 out then shuffled back to 6th with no headway into the straight - dropped away late to finish well beaten 9/15 ½ 10-0 9383C86C John Shinnick 20/1
18 Jul 24+47d Killarney Adare Manor Opportunity Handicap Hurdle (80-116) 20.5f · Good · 15 ran 11/15 19 10-7 9595C80C Jake Coen 50/1
01 Jun 24+21d Listowel Shay Rooney Opportunity Maiden Hurdle 20.5f · Good · 11 ran 9/11 30 11-2 —46C94C Aidan Kelly 33/1
11 May 24+20d Cork Racing Again May 21st Maiden Hurdle 24.5f · Good · 13 ran 6/13 6½ 11-12 —57B98A Darragh O'Keeffe 80/1
21 Apr 24 Tramore Adare Manor Opportunity Maiden Hurdle 21.5f · Yielding · 10 ran 7/10 29 11-4 —114C87C Gavin Brouder 33/1

Quick answers

How many races has Diamond Duke won?
Diamond Duke (IRE) has yet to win, from 6 archived starts between 2024 and 2025.
Who trained Diamond Duke?
Diamond Duke (IRE) was trained by Terence O'Brien on the most recent run on record, at Punchestown on 12 January 2025.
Who is Diamond Duke's sire?
Diamond Duke (IRE) is by Diamond Boy (FR) out of Damefirth (IRE), whose sire is Flemensfirth.
What is Diamond Duke's official rating?
Diamond Duke (IRE)'s highest official rating on record is 95.
What is Diamond Duke's sire's record?
Diamond Boy (FR)'s progeny in our archive have won 12% of 2,279 runs since Jan 2008 (285 horses), Flat and jumps together.
Who are Diamond Duke's siblings?
Out of Damefirth (IRE), Diamond Duke (IRE) has 3 other produce in our archive, 2 of them winners. Most wins: Find A Fortune (IRE) (1). The wins came over 2m1½f–2m4f. As at Oct 2026.

Record shown from April 2024. Our archive holds racing in Great Britain, Ireland and France from January 2005. Runs in other countries are not in it, and earlier runs are not available from our data provider. In-running comments are available from 2024 onward.