Jamie Spencer
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%".
Rides around 490 times a season, almost all on the flat, winning on 15% of them — level with the margin-free market read across the lifetime window (Fair A/E 0.98). Riding last-time-out winners the record reads 18% (1,410 rides).
The record is strongest at Southwell (AW) (27%, n=159) and Redcar (28.6%, n=49) — all clear of the rider's 15% baseline. Rides in big fields of 14 or more have been a poor signal at 8.1% (n=1,796, Fair A/E 1.01). The market has consistently overbet in Group and Graded company the record: 9.2% strike, Fair A/E 0.85 and −243.13 to a £1 stake over 1,460 rides — those runners underperform what the price implies. David Simcock supplies 13% of the rides and edges the rider's average (18.2% vs 15%, A/E 1.09) — the partnership beats the margin-free market read. The rider also reads well on Firm going (27.4%, n=62). The record reads poorly over 2m1f – 2m4f — 5.1% over 79 rides, 9.9pts below the baseline. 193 Group and Graded wins sit in the archive record — the biggest prize the rider has landed: the Queen Elizabeth II Jubilee Stakes at Ascot (Jun 2023, £567,100). The standout partner of the record: Boz (GB) — 8 wins from 15 rides together. Seasonally, the rider fires Nov–Mar.
Riding patterns
the angles behind the record · vs 15% baselineEach tile is the record in that situation vs the 15% 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 baselineRecord by conditions
same window as headerRace type
Going
Courses
Class
Market position
Distance
By season
Handicaps
Field size
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 firstBy month
strike by month, lifetimeRiding for
same window · biggest samples firstCareer highlights
lifetime archive, 2005→Sires of the horses ridden
progeny record · win % by ground and tripThe record
latest 50 of 12,466 · newest firstThe latest 50 of 12,466 archived rides, newest first. The full record runs from 9 February 2005 to 25 September 2026.
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 Jamie Spencer's strike rate?
- Jamie Spencer has won 1,395 of 9,305 rides since 2008, a strike rate of 15% (as at 14 November 2026). Figures are computed from our own results archive.
- Which course does Jamie Spencer do best at?
- Wolverhampton (AW) by strike rate: 129 wins from 650 rides (19.8%) 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 Jamie Spencer ride most for?
- David Simcock, with 1,167 rides since 2008 — 13% of the total. That pairing has won 212 (18.2%).
- What is Jamie Spencer's Fair A/E?
- 0.98, from 9,268 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.