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Master Zack

Four-year-old Master Zack has had to work hard for everything he's earned. One win from 20 races tells you this isn't a horse who makes things look easy — but that single victory, at Southwell in April 2025, proved he can get the job done when the conditions are right.Based on TrackLab's analysis
Quick facts
Age
4 years old
Sex
Colt
Colour
Bay
Father
Ardad
Mother
Amna
Owner
T C O'Brien
Official rating
46

📊 Key numbers

Career totals for this horse
21
Career races
1
Wins
4.8%
Win rate
avg ~10%
19.0%
Top-3 rate
avg ~30%
199 days
Since last race

🔍 Full analysis

Our model's view, based on this horse's career and recent runs
TrackLab's detailed breakdown

The most revealing number in his record is what happens when he's kept to the shortest distances. Over sprints of less than five furlongs, he's won 1 from 4 races — that's a 25% win rate, miles better than his overall record of 1 in every 20. In other words, when he's asked to be quick rather than quick and sustained, he looks like a completely different horse. That's a meaningful pattern, and any smart punter would be paying attention to it.

He competes mainly at Class 6 level, which is the entry level of British racing — the races where horses who haven't found their feet or are chasing a first win tend to gather. There's no shame in it, but it does mean the competition isn't exactly the cream of the crop, which makes his 1-from-17 record at that level (roughly 6%, or 1 in every 17 races) a touch sobering. Still, he's clearly capable of finishing in the mix: four places from 20 races shows he's not just making up the numbers.

He's trained by Martin Dunne out of Newmarket, the heartland of British flat racing, and the yard has been in decent form this season with 20 winners on the board. Master Zack hasn't added to that tally in his last six outings — his recent form reads 7-14-9-3-6, which is patchy to say the least — but he raced just 22 days ago and remains an active part of the string. The team clearly believe there's another win in him somewhere.

The short-sprint angle is the one thread worth pulling. If Martin Dunne finds him a race under five furlongs where the draw and the pace set-up fall kindly, Master Zack has already shown he can win at that trip. He's not a horse you'd build a fortune around, but he's far more interesting than his overall record suggests.

⚡ Strengths and risks

What helps this horse and what to watch out for
✓ What works in their favour
✔ Excellent record on standard ground: 1 wins from 9 starts (11%)
✔ Well suited by Sprint (< 5f) distances: 20% win rate
⚠ What to watch out for
⚠ Poor record on good_to_firm ground: 0 wins from 5 starts
⚠ Yet to win at chelmsford in 5 attempts
⚠ Struggles on Galloping tracks: 0 wins from 5 starts

🎯 Where this horse runs best

Results split by ground, distance, race level and track shape
🌧 Ground
Standard (all-weather)
Loves
Good to soft (some give)
Unknown
Soft (muddy)
Unknown
Standard to slow (all-weather)
Unknown
Firm (dry)
Unknown
Good (a little give)
Unknown
Good to firm (fairly firm)
Avoids
📏 Race distance
Sprint (< 5F)
Loves
5F – 6½F
Avoids
🏅 Race level
Class 4 (standard)
Unknown
Class 5 (entry-level)
Unknown
Class 6 (grassroots)
🏟 Track shape
Left-handed, long straights
Loves
Left-handed, hilly
Unknown
Right-handed, long straights
Unknown
Right-handed, tight turns
Unknown
Left-handed, tight turns
Unknown
Long straights
Avoids

📅 Recent runs

The last 10 races, most recent first
2 Apr
13th
Southwell
Sprint (< 5f) · Standard · 13 runners
7 Mar
7th
chelmsford
5f – 6½f · Standard
21 Oct
14th
Great Yarmouth
5f – 6½f · Good_To_Soft · 16 runners
3 Oct
9th
Southwell
Sprint (< 5f) · Standard · 10 runners
18 Aug
DNF
Windsor
5f – 6½f · Good_To_Firm · 7 runners
6 Aug
3rd
Great Yarmouth
5f – 6½f · Good_To_Firm · 7 runners
2 Aug
6th
Lingfield Park
Sprint (< 5f) · Good · 7 runners
26 Jun
4th
Nottingham
5f – 6½f · Good_To_Firm · 6 runners
15 Jun
3rd
Doncaster
5f – 6½f · Good_To_Firm · 8 runners
31 May
8th
Southwell
Sprint (< 5f) · Standard · 9 runners

🏇 Jockeys

Every jockey who has ridden this horse, most rides first
0%
Win rate
0/3
Wins / rides
50%
Win rate
1/2
Wins / rides
0%
Win rate
0/2
Wins / rides
0%
Win rate
0/2
Wins / rides
0%
Win rate
0/1
Wins / rides
0%
Win rate
0/1
Wins / rides
0%
Win rate
0/1
Wins / rides
0%
Win rate
0/1
Wins / rides
0%
Win rate
0/1
Wins / rides
0%
Win rate
0/1
Wins / rides
0%
Win rate
0/1
Wins / rides
0%
Win rate
0/1
Wins / rides
0%
Win rate
0/1
Wins / rides
Ryan Kavanagh
0%
Win rate
0/1
Wins / rides
Jack Dace
0%
Win rate
0/1
Wins / rides

🏟 Course record

Win rate at each course this horse has visited
CourseRacesResultsLast runWin rate
chelmsford 5 5 other 7 Mar 0%
Southwell
Galloping
4 1 win, 3 other 2 Apr 25%
Bath
Undulating
2 1 third, 1 other 5 May 0%
Windsor
Sharp
2 2 other 18 Aug 0%
Great Yarmouth
Galloping
2 1 third, 1 other 21 Oct 0%
Nottingham
Galloping
1 1 other 26 Jun 0%
Wolverhampton
Galloping
1 1 other 23 Nov 0%
Sandown Park
Galloping
1 1 other 13 Sep 0%
Newmarket
Galloping
1 1 other 24 Aug 0%
Doncaster
Galloping
1 1 third 15 Jun 0%
Lingfield Park
Sharp
1 1 other 2 Aug 0%