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Horse profile

Must Bay (FR)

3yo colt · Trainer C Lerner · Owner Jean Claude Seroul
5 runs · 3 courses · from Nov 2025
As at 1 Nov 2026 · KTB archive: GB, Ireland & France · 2005–present, updated daily
Won at Saint-Cloud (FR) New yard Last run 11 Sep 2026 · 4th of 8 Last raced off OR 96
KTB Profile

Must Bay (FR) is 1 from 5. The win came on good or faster ground (0 from 4 on softer). Last raced off a career-high mark of 96.

Based on 5 archived runs · updated 1 Nov 2026
KTB at a glance Wins on good or faster

KTB Speed and Rating

KTB Speed

No KTB Speed figures for this horse. The engine scores GB and Irish racing from Oct 2016; runs elsewhere, or earlier, have no figure.

KTB Speed v1 · batch 15 Sep 2026 · GB & Irish racing only · 0 figures from 0 runs · a record, not a forecast

KTB Rating

No KTB Rating figures for this horse. The engine scores GB and Irish racing; runs elsewhere, or earlier, have no figure.

KTB Rating v1 · batch 3 Oct 2026 · GB & Irish racing only · 0 figures from 0 runs · 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.

Run style is derived from in-running commentary, which our data provider does not supply for this horse's races.

Pedigree intelligence

Sire

Progeny in our archive have won 14.3% of 3,987 runs since Jun 2020 (425 horses).

Weakest at trips under 6f (all codes): 10.8% from 102.

GoingRunsWinsSRvs sireThis horse
Firm800%−14.3—
Good to Firm5879215.7%+1.4—
Good99514014.1%−0.21 from 1
Good to Soft4717014.9%+0.60 from 3
Soft6258113%−1.3—
Heavy1832714.8%+0.50 from 1
Standard (AW)1,11816114.4%+0.1—
Distance (all codes)RunsWinsSRvs sireThis horse
Under 6f1021110.8%−3.5—
6f – 7f1,18418315.5%+1.2—
1m – 1m1f1,27816512.9%−1.4—
1m2f – 1m4f1,09316515.1%+0.81 from 5
1m5f – 2m2724014.7%+0.4—
2m1f – 2m4f53713.2%−1.1—
2m5f – 3m500%−14.3—

Flat and jumps together (all codes) · since Jun 2020 · as at 31 Oct 2026 · rows under 30 runs muted · win % is the measure, a record not a forecast

Dam

No other produce in our archive. It holds racing in Great Britain, Ireland and France from 2005, so siblings racing elsewhere won’t appear here.

Record by conditions

GoingRunsWinsSR£1
Good to Soft 3 0 0% −3.00
Good 1 1 100% +6.90
Heavy 1 0 0% −1.00

ClassRunsWinsSR£1
Class 1 2 0 0% −2.00

CourseRunsWinsSR£1
Saint-Cloud (FR) 3 1 33% +4.90
Clairefontaine (FR) 1 0 0% −1.00
Longchamp (FR) 1 0 0% −1.00

HeadgearRunsWinsSR£1
Tongue tie 2 0 0% −2.00
Hood + tongue tie 2 1 50% +5.90
None 1 0 0% −1.00

SeasonRunsWinsSR£1
2026 4 1 25% +3.90
2025 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 OR Jockey SP
2026 · 4 runs
11 Sep 26+28d Saint-Cloud (FR) Prix Turenne Class 1 · 1m4f · Good To Soft · 8 ran 4/8 hd 8-13 96 Ronan Thomas 5/1
14 Aug 26+78d Clairefontaine (FR) Prix Des 20 Ans De Radio Balances (Grand Prix De Clairefontaine) Class 1 · 1m4f · Good To Soft · 9 ran 4/9 ½ 8-13 94 Ronan Thomas 17/2
28 May 26+27d Longchamp (FR) Sosafe Prix des Epinettes (Handicap) (Turf) 1m2½f · Good To Soft · 16 ran 6/16 hd 9-12 94 Ronan Thomas 41/10F
01 May 26+168d Saint-Cloud (FR) Prix de Beaumesnil (Handicap) (Turf) 1m2f · Good · 16 ran 1/16 9-3 86 Ronan Thomas 69/10
2025 · 1 run
14 Nov 25 Saint-Cloud (FR) Prix Kantar (Conditions) (2yo Colts & Geldings) (Turf) 1m2f · Heavy · 9 ran 5/9 1¾ 9-2 — Ronan Thomas 8/5F

Quick answers

How many races has Must Bay won?
Must Bay (FR) won 1 of 5 archived starts between 2025 and 2026, a strike rate of 20%. Placed 1 time in total (20% of starts).
Who trains Must Bay?
Must Bay (FR) is trained by C Lerner, who saddled the horse on its most recent run on 11 September 2026.
Who is Must Bay's sire?
Must Bay (FR) is by New Bay (GB) out of Madeleine Must (FR), whose sire is Motivator.
What is Must Bay's official rating?
The most recent official rating on record is 96, from the run on 11 September 2026. That is also the highest on record.
What is Must Bay's sire's record?
New Bay (GB)'s progeny in our archive have won 14.3% of 3,987 runs since Jun 2020 (425 horses), Flat and jumps together. Weakest at trips under 6f (all codes): 10.8% from 102.

Record shown from November 2025. Our archive holds racing in Great Britain, Ireland and France from January 2005. Any runs before that, or in other countries, are not in it. In-running comments are available from 2024 onward.