Jack Osborn
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%".
Rode around 30 times a season, almost all on the flat, winning on 8% of them — level with the margin-free market read across the lifetime window (Fair A/E 1.00). Rode mostly for John Ryan — 40% of rides in the window.
First rides on a horse have been a poor signal at 4.2% (n=95, Fair A/E 0.61). John Ryan supplied 40% of the rides and edges the rider's average (10% vs 8%, A/E 1.25) — the partnership beats the margin-free market read. The rider also read well off a 0-7-day break (17.6%, n=34) and off a 15-30-day break (12%, n=50). The record read poorly off a 8-14-day break — 4.7% over 43 rides, 3.3pts below the baseline. The market has consistently overbet the rider on Standard (AW) going: Fair A/E 0.71 across 98 rides (6.1% strike, −58.75 to a £1 stake) — runners there underperformed what the price implied.
Riding patterns
the angles behind the record · vs 8% baselineEach tile is the record in that situation vs the 8% baseline — descriptive splits with the sample always shown, not tips. 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 headerGoing
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, 2013→Sires of the horses ridden
progeny record · win % by ground and tripThe record
latest 50 of 175 · newest firstThe latest 50 of 175 archived rides, newest first. The full record runs from 16 September 2013 to 2 June 2018.
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 Jack Osborn's strike rate?
- Jack Osborn has won 14 of 175 rides since 2008, a strike rate of 8% (as at 28 October 2026). Figures are computed from our own results archive.
- Which yard does Jack Osborn ride most for?
- John Ryan, with 70 rides since 2008 — 40% of the total. That pairing has won 7 (10%).
- What is Jack Osborn's Fair A/E?
- 1.00, from 174 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.