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Jockey profile

Joanna Mason

2,775 rides in the last 5 seasons · 981 individual horses
As at 12 Nov 2026 · KTB archive: 2005–present, updated daily
In form — 3 winners last 14 days Last ride 5 days ago 100% of rides on the flat
from 1 Jan 2022
279–2,775
Wins / Runs
10.1%
Strike rate
n=2,775
800 (29%)
Placed
1.00
n=2,764 · 0.85 incl. margin
−510.05
£1 level stake
n=2,775 at SP · −18.4%
£3.54m
Prize money (window)
Strike by season
10.6%
KTB Rider Profile

Rides around 560 times a season, almost all on the flat, winning on 10% of them — level with the margin-free market read across five seasons (Fair A/E 1.00). Riding last-time-out winners the record reads 17% (285 rides). The rider is in form now — 3 winners in the last fortnight, above their own baseline.

Deterministic profile computed from 2,775 archived runs (last 5 seasons) · updated 12 Nov 2026
KTB at a glance Fires Dec–Jan 26.3% when favourite Michael & David Easterby: 10.7% from 994 LTO winners: 16.8% Rides the favourite in 9% of races
The read

The record is strongest at Pontefract (15.2%, n=132), clear of the rider's 10.1% baseline. It is weakest at Chelmsford City (AW) (2.5% over 40 rides) — the widest gap in the record. Rides on last-time-out winners have been a positive signal at 16.8% (n=285, Fair A/E 1.08), but horses returning fresh after 61+ days have been a poor signal at 6.9% (n=361, Fair A/E 0.98). Rides in big fields of 14 or more are the standout value angle: 8.9% strikes only just below baseline, but Fair A/E 1.39 and +21.57 to a £1 stake over 326 rides — a record the market has persistently underpriced. Right now the rider is firing: 3 winners from 18 rides in the last 14 days (16.7%, 6.6pts above the 10.1% baseline). Michael & David Easterby supplies 36% of the rides and matches the rider's average almost exactly (10.7%, A/E 0.99) — the market has that partnership priced right. The rider also reads well off a 0-7-day break (15%, n=187). The record reads poorly off a 61-180-day break — 5.4% over 204 rides, 4.7pts below the baseline. 3 Group and Graded wins sit in the archive record — the biggest prize the rider has landed: the Sky Bet Constantine Handicap Stakes at York (Aug 2026, £69,579). The standout partner of the record: Tapis Libre (GB) — 10 wins from 34 rides together. Seasonally, the rider fires Dec–Jan.

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

Riding patterns

the angles behind the record · vs 10.1% baseline
First ride on the horse · first captured pairing
7.4%−2.7
n=920 · A/E 0.99 · £1 −171.99
Last-time-out winners · previous run was a win
16.8%+6.7
n=285 · A/E 1.08 · £1 −15.75
Fresh horses · 61+ days off
6.9%−3.2
n=361 · A/E 0.98 · £1 −94.98
When favourite
26.3%
n=240 · A/E 0.96 · £1 −43.02
Claiming rides · riding with a claim
7.8%−2.3
n=154 · A/E 0.86 · £1 −47.67
Big fields · 14+ runners
8.9%−1.2
n=326 · A/E 1.39 · £1 +21.57
Group / Graded races · pattern & listed
27.3%+17.2
n=11 · A/E 2.97 · £1 +3.75

Each tile is the record in that situation vs the 10.1% 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
On last-time-out winners 16.8% vs 10.1% · n=285
At Chelmsford City (AW) 2.5% vs 10.1% · n=40
With Gemma Tutty 16.1% vs 10.1% · n=93
Off a 0-7-day break 15% vs 10.1% · n=187
Off a 61-180-day break 5.4% vs 10.1% · n=204
At Pontefract 15.2% vs 10.1% · n=132
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

Going

GoingRWSR£1
Standard (AW) 1,147 106 9.2% −242.67
Good 580 54 9.3% −153.74
Good to Firm 464 47 10.1% −16.27
Good to Soft 279 35 12.5% −20.71
Soft 228 26 11.4% −77.16
Heavy 77 11 14.3% +0.50

Courses

CourseRWSR£1
Southwell (AW) 429 42 9.8% −118.20
Newcastle (AW) 391 29 7.4% −148.34
Wolverhampton (AW) 262 32 12.2% +72.62
Beverley 189 24 12.7% −25.22
Thirsk 150 12 8% −80.42
Catterick 146 18 12.3% −21.21
Redcar 141 13 9.2% +29.75
Pontefract 132 20 15.2% +11.08
York 111 7 6.3% +16.00
Ripon 102 13 12.7% −24.33
Doncaster 102 8 7.8% −34.50
Ayr 95 14 14.7% +4.45
Nottingham 75 8 10.7% −17.52
Musselburgh 75 6 8% −44.67
Carlisle 70 6 8.6% −21.92

Class

ClassRWSR£1
Class 6 1,078 116 10.8% −70.38
Class 5 862 85 9.9% −246.69
Class 4 518 47 9.1% −182.73
Class 3 161 14 8.7% −10.00
Class 2 142 13 9.2% −6.50
Class 1 11 3 27.3% +3.75

Market position

In the bettingRWSRA/E£1
Favourite 279 70 25.1% 0.96 −47.36
2nd–3rd fav 613 94 15.3% 0.94 −133.69
4th–6th fav 890 80 9% 1.09 −136.00
7th+ in betting 993 35 3.5% 1.08 −193.00
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.

Horses ridden

same window as header · most-raced first
HorseRWPlLast ran
Valley Of Flowers (IRE) 36 6 17 17 Sep 26
Gustav Graves (GB) 36 7 17 6 Apr 26
Eligible (IRE) 33 8 10 26 May 26
Mumcat (GB) 26 2 11 4 Apr 25
Copper And Five (GB) 25 2 7 16 Sep 26
Ring Of Gold (GB) 25 0 9 24 Feb 26
Copper Mountain (GB) 23 4 10 30 Apr 25
Popular Dream (GB) 22 5 10 6 Oct 26
Woodstock (GB) 20 4 8 3 Nov 26
Without Flaw (IRE) 20 1 6 27 Aug 26
Jamih (GB) 20 3 8 26 Jul 25
Kipp Kelly (GB) 19 1 4 3 Nov 26
Showing the 60 most-raced of the 981 horses ridden in this window — each ran at least 9 times. 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.

Current form

significance-gated

Last 14 days

In form
3 from 18 16.7% · +6.6pts vs baseline
Last 14 days16.7%
5-season base10.1%
Shown only when the 14-day window is large enough to mean anything (n≥15). A cold run renders the same card with a quiet badge — never hidden.

By month

strike by month, 5 seasons
JFMAMJJASOND
1278121091210812812
A flat rider: the season runs Mar–Oct. Muted months are small samples (under 30 runs) — read them with the caution they deserve.

Riding for

same window · biggest samples first
36% of all rides
10.7% SR · A/E 0.99
TrainerRWSR£1
Michael & David Easterby 994 106 10.7% −202.38
Ruth Carr 258 34 13.2% +29.33
Derek Shaw 149 18 12.1% +24.83
Roger Fell 96 12 12.5% −15.52
Gemma Tutty 93 15 16.1% +73.33
Tina Jackson 78 10 12.8% +39.38
Jacqueline Coward 62 6 9.7% −21.50
Sara Ender 52 3 5.8% −29.25
Ben Haslam 42 6 14.3% −5.75
Harriet Bethell 37 4 10.8% −14.75
Michael Appleby 37 3 8.1% −8.75
Katie Scott 32 3 9.4% −11.25
Muted rows are under 30 rides.

Career highlights

lifetime archive, 2006→
363
Archived wins
3
Pattern / graded wins
£4.11m
Prize money
2025
Best season · 69 wins
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.
Sondad (GB) — Sky Bet Constantine Handicap Stakes (Heritage Handicap) York · Aug 2026 · Class 2
£69,579
Hucklesbrook (GB) — Churchill Tyres Supporting Macmillan Sprint Handicap York · Jun 2025 · Class 2
£64,425
Sondad (GB) — Liverpool FC Foundation Scurry Handicap Curragh (IRE) · Jul 2026
£60,000

Sires of the horses ridden

progeny record · win % by ground and trip
Bobby's Kitten (USA) 13% · 9–69
Progeny have won 7.9% of 1,675 runs since 2020 (144 horses).
Havana Gold (IRE) 6.2% · 4–65
Progeny have won 9.5% of 5,064 runs since 2017 (402 horses). Weakest on Heavy going: 4.2% from 118. Strongest at trips under 6f (all codes): 13% from 523. Weakest over 1m5f – 2m (all codes): 6.2% from 177.
Dark Angel (IRE) 17.2% · 10–58
Progeny have won 11.3% of 21,957 runs since 2011 (1,596 horses). Strongest on Firm going: 15% from 107.
Sixties Icon (GB) 21.8% · 12–55
Progeny have won 10% of 5,685 runs since 2012 (338 horses). Strongest on Heavy going: 13.3% from 264. Weakest on Standard (AW) going: 6.4% from 1,338.
Mehmas (IRE) 15.4% · 8–52
Progeny have won 11.5% of 8,241 runs since 2020 (755 horses).
Time Test (GB) 5.8% · 3–52
Progeny have won 11% of 3,166 runs since 2021 (337 horses). Weakest on Soft going: 6.8% from 336. Strongest over 1m5f – 2m (all codes): 14.9% from 323.
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 12 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 3,496 · newest first

The latest 50 of 3,496 archived rides, newest first. The full record runs from 1 August 2006 to 7 November 2026.

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).

KTB’s figures

the forward record · since 5 Oct 2026

KTB’s figures on this rider’s mounts since 5 Oct 2026: the KTB Selection in 4 runs (won 2) · top-rated on KTB Rating in 9 runs (won 4) · fastest on KTB Speed in 6 runs (won 1, 1 did not run) · to 7 Nov 2026.

Each pick was a KTB figure’s choice before the off — the published KTB Selection, the top-rated horse on KTB Rating, the fastest on KTB Speed — settled against the result the next morning and never worked out again; “did not run” is counted apart. GB and Irish races only. A record of weeks so far: read it as a count, not a verdict.

Quick answers

What is Joanna Mason's strike rate?
Joanna Mason has won 279 of 2,775 rides since 2022, a strike rate of 10.1% (as at 12 November 2026). Figures are computed from our own results archive.
Which course does Joanna Mason do best at?
Pontefract by strike rate: 20 wins from 132 rides (15.2%) since 2022. 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 Joanna Mason ride most for?
Michael & David Easterby, with 994 rides since 2022 — 36% of the total. That pairing has won 106 (10.7%).
Is Joanna Mason in form?
In the last 14 days: 18 rides, 3 winners, a strike rate of 16.7%. That is above the baseline of 10.1% since 2022.
What is Joanna Mason's Fair A/E?
1.00, from 2,764 rides with a computed fair probability since 2022. 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 12 November 2026, computed from our own results archive (2005 onwards; aggregates from 2008).