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Jockey profile

Marc-Olivier Belley

174 rides in the lifetime window · 82 individual horses
As at 6 Nov 2026 · KTB archive: 2005–present, updated daily
Last ride Jun 2021 98% of rides over jumps
No rides 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.
27–174
Wins / Runs
15.5%
Strike rate
n=174
47 (27%)
Placed
1.37
n=156 · 1.30 incl. margin
+64.90
£1 level stake
n=166 at SP · +39.1%
£896k
Prize money (window)
Strike by season
0%
KTB Rider Profile

Rode around 10 times a season, almost all over hurdles and fences, winning on 16% of them — beating the margin-free market read across the lifetime window (Fair A/E 1.37). First rides on a horse are a strength: 17% on the first captured pairing (82 rides). Rode mostly for B Lefevre — 48% of rides in the window.

Deterministic profile computed from 174 archived runs (lifetime window) · updated 6 Nov 2026
KTB at a glance B Lefevre: 16.9% from 83 First rides: 17.1%
The read

It is weakest at Auteuil (FR) (9% over 78 rides) — the largest sample in the record, and the widest gap. Horses returning fresh after 61+ days have been a poor signal at 8.9% (n=56, Fair A/E 0.85). B Lefevre supplied 48% of the rides and matches the rider's average almost exactly (16.9%, A/E 1.58) — the partnership beats the margin-free market read. The rider also read well in Chase races (20.5%, n=44). The record read poorly off a 61-180-day break — 9.7% over 31 rides, 5.8pts below the baseline. 5 Group and Graded wins sit in the archive record — the biggest prize the rider has landed: the Prix Hopper at Enghien (FR) (Apr 2014, £36,000). The standout partner of the record was Rusquela (FR) — 5 wins from 8 rides together.

Written from the figures on this page — every claim carries its sample. Descriptive, not a tip.

Riding patterns

the angles behind the record · vs 15.5% baseline
First ride on the horse · first captured pairing
17.1%+1.6
n=82 · A/E 1.53 · £1 +69.10
Last-time-out winners · previous run was a win
19.2%+3.7
n=26 · A/E 1.27 · £1 −4.90
Fresh horses · 61+ days off
8.9%−6.6
n=56 · A/E 0.85 · £1 −7.60
When favourite
55.6%
n=18 · A/E 2.10 · £1 +15.00
Big fields · 14+ runners
11.1%−4.4
n=54 · A/E 1.63 · £1 +9.70
Group / Graded races · pattern & listed
13.2%−2.3
n=38 · A/E 1.12 · £1 −18.90

Each tile is the record in that situation vs the 15.5% baseline — descriptive splits with the sample always shown, for you to weigh. Tiles under 30 runs render muted. First rides are the first captured pairing of horse and rider; last-time-out winners are horses whose previous captured run was a win; claiming rides are runs where the rider carried a weight claim. Group / Graded covers pattern and listed races.

Notable angles

vs their own baseline
At Auteuil (FR) 9% vs 15.5% · n=78
With horses switching code 21.7% vs 15.5% · n=46
Off a 61-180-day break 9.7% vs 15.5% · n=31
In Chase races 20.5% vs 15.5% · n=44
With debutants 19.5% vs 15.5% · n=41
On Heavy going 12.5% vs 15.5% · n=48
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 126 18 14.3% −5.10
Chase 44 9 20.5% +72.00
Flat 4 0 0% −2.00

Going

GoingRWSR£1
Soft 111 16 14.4% +79.50
Heavy 48 6 12.5% −21.70
Good to Soft 9 3 33.3% +2.00
Good 5 2 40% +5.10
Good to Firm 1 0 0% —

Courses

CourseRWSR£1
Auteuil (FR) 78 7 9% −11.90
Enghien (FR) 44 7 15.9% −13.30
Compiegne (FR) 20 3 15% −9.60
Angers 7 2 28.6% +0.10
Nantes 4 1 25% −1.10
Le Lion-D'Angers 3 0 0% −2.00
Chateaubriant 3 1 33.3% −2.00
Rochefort-Sur-Loire 2 1 50% +3.80
Fontainebleau 2 2 100% +91.20
Vichy (FR) 2 1 50% +7.40
Cagnes-Sur-Mer (FR) 1 0 0% −1.00
Craon 1 0 0% —
Durtal 1 0 0% —
Pau (FR) 1 1 100% +4.00
La Roche-Sur-Yon 1 0 0% —

Class

ClassRWSR£1
Class 1 38 5 13.2% −18.90

Market position

In the bettingRWSRA/E£1
Favourite 19 10 52.6% 1.98 +14.00
2nd–3rd fav 34 9 26.5% 1.56 +15.40
4th–6th fav 53 5 9.4% 0.99 +65.50
7th+ in betting 60 1 1.7% 0.54 −30.00
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
75.9% completed · 170 obstacle rides (chases & hurdles)
CodeRCompFURPUBDOth
Chase 44 75% 2 0 9 0 0
Hurdle 126 76.2% 14 1 14 0 1
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 ridden

same window as header · most-raced first
HorseRWPlLast ran
Resent Full (FR) 10 0 2 19 Mar 16
Montgeoffroy (FR) 8 1 3 10 Nov 19
Rusquela (FR) 8 5 7 27 Sep 14
Kalmia (FR) 7 1 3 16 May 20
Prince De Bellouet (FR) 5 1 2 9 Oct 16
Baby Lone Glory (FR) 5 1 2 27 May 16
Uranice (FR) 5 1 1 31 Oct 13
Helen De Rochereuil (FR) 5 0 0 10 May 12
Kapsoura (FR) 4 0 0 12 Apr 16
Savoyard (IRE) 3 0 0 12 Jun 21
Irresistibles (FR) 3 1 2 9 Jun 19
Tresor Du Roume (FR) 3 0 0 16 Mar 19
Showing the 60 most-raced of the 82 horses ridden in this window — each ran at least 1 time. Horses with fewer runs aren't listed; search finds any horse since 2005. 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.

By month

strike by month, lifetime
JFMAMJJASOND
·01523121733100412210
A jumps rider: the season runs Oct–Apr. Muted months are small samples (under 30 runs) — read them with the caution they deserve.

Riding for

same window · biggest samples first
Main yardB Lefevre
48% of all rides
16.9% SR · A/E 1.58
TrainerRWSR£1
B Lefevre 83 14 16.9% +9.50
J Boisnard 54 8 14.8% −15.30
Muted rows are under 30 rides and sit behind "Show all".

Career highlights

lifetime archive, 2010→
27
Archived wins
5
Pattern / graded wins
£896k
Prize money
2016
Best season · 5 wins
Rusquela (FR) — Prix Hopper (Chase) () (4yo) (Turf) Enghien (FR) · Apr 2014 · Listed
£36,000
Rusquela (FR) — Prix Durtain (Hurdle) () (4yo) (Turf) Enghien (FR) · Apr 2014 · Listed
£34,000
Park Light (FR) — Prix Hubert d'Aillieres (Hurdle) () (5yo+) (Turf) Auteuil (FR) · Mar 2016 · Listed
£30,000

Sires of the horses ridden

progeny record · win % by ground and trip
Cachet Noir (USA) 0% · 0–10
Progeny have won 14.4% of 257 runs since 2008 (47 horses).
Doctor Dino (FR) 11.1% · 1–9
Progeny have won 16% of 3,224 runs since 2013 (497 horses). Strongest on Good going: 19.8% from 562. Weakest on Standard (AW) going: 9.5% from 211. Strongest over 1m5f – 2m (all codes): 19.7% from 694. Weakest over 1m – 1m1f (all codes): 8.7% from 138.
Balko (FR) 12.5% · 1–8
Progeny have won 12.7% of 2,661 runs since 2011 (297 horses).
Khalkevi (IRE) 62.5% · 5–8
Progeny have won 14.7% of 1,005 runs since 2008 (135 horses). Strongest over 1m5f – 2m (all codes): 17.9% from 190.
Laveron (GB) 25% · 2–8
Progeny have won 10.2% of 1,171 runs since 2008 (142 horses). Strongest on Good to Soft going: 14.9% from 161. Weakest on Soft going: 6.9% from 477.
Authorized (IRE) 14.3% · 1–7
Progeny have won 13.5% of 7,032 runs since 2011 (543 horses). Weakest on Standard (AW) going: 9.3% from 1,044. Strongest beyond 3m (all codes): 19.8% from 126. Weakest over 6f – 7f (all codes): 6.4% from 267.
Top line: the rider'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 6 Nov 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 174 · newest first

The latest 50 of 174 archived rides, newest first. The full record runs from 5 May 2010 to 21 June 2021.

DateCourseHorseRaceFinishSP

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 Marc-Olivier Belley's strike rate?
Marc-Olivier Belley has won 27 of 174 rides since 2008, a strike rate of 15.5% (as at 6 November 2026). Figures are computed from our own results archive.
Which course does Marc-Olivier Belley do best at?
Enghien (FR) by strike rate: 7 wins from 44 rides (15.9%) since 2008. Read from the 15 courses with the most rides on the same basis, and only those with at least 30 — a small sample cannot top the list, and a rarely-visited course is not in the comparison.
Which yard does Marc-Olivier Belley ride most for?
B Lefevre, with 83 rides since 2008 — 48% of the total. That pairing has won 14 (16.9%).
What is Marc-Olivier Belley's Fair A/E?
1.37, from 156 rides 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 6 November 2026, computed from our own results archive (2005 onwards; aggregates from 2008).