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Defiantly: The Irish Stayer at the Top of the Cup Market

Defiantly won two of his last three starts over long trips this summer and was beaten a head in the other. The second win was the Prix Kergorlay by five and a half lengths. That win made him ballot-exempt for the Melbourne Cup, and he now heads the market.

Niamh CorriganWritten by: Niamh CorriganChecked by: Maren HoltUpdated:

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Defiantly is the favourite for the 2026 Melbourne Cup at Flemington on Tuesday 3 November, and he got there in ten weeks. In June he was a 25/1 shot in a handicap at Royal Ascot. By late August he had won at Goodwood and then the Group 2 Prix Kergorlay at Deauville by five and a half lengths, a win that came with a ballot-exempt place in the Cup. The question for bettors is whether a horse with nine career starts, none of them in Australia, deserves to be the shortest price in a 24-runner handicap.

On this page6 sectionsexpand
  1. Nº 01Defiantly at a glance
  2. Nº 02Record
  3. Nº 03What is known about Defiantly
  4. Nº 04Melbourne Cup 2026: chances and why
  5. Nº 05How to bet on Defiantly
  6. Nº 06Where to watch
Avatar for Defiantly: a drawn racehorse head, not a photograph
Defiantly. Avatar illustration, not a photograph of the horse: no free-licence photo of Defiantly is available.

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Defiantly at a glance

NameDefiantly (FR)
Age4 (foaled 10 April 2022)
SexGelding
ColourChestnut
BreedThoroughbred
SireKameko (USA), a 2000 Guineas winner
DamRoheryn (IRE), a stakes winner by Galileo
BreederQatar Racing
TrainerJoseph O'Brien, Ireland
JockeyDylan Browne McMonagle in his last two wins; Cup rider not yet confirmed
OwnerAustralian Bloodstock
Career9 starts, 3 wins, 1 second, 1 third
2026 Melbourne Cup weight56.5kg, ballot-exempt

His path to the yard was not a straight line. He made €310,000 as a yearling at Arqana's Deauville sale in 2023, bought by the Hong Kong Jockey Club, was later resold online at Tattersalls to Joseph O'Brien for 41,000 guineas, and was bought privately in 2026 to race for Australian Bloodstock. He is a half-brother to Middle Earth, third in the 2025 Melbourne Cup, and to the Group 1 winner Buckaroo, trained in Sydney by Chris Waller.

Record

DateRaceDistanceGoingResult
19 Jun 2025Maiden, Leopardstown1m 4f 180yGood3rd of 8
14 Jul 2025Maiden, Killarney1m 3f 73yYielding to softWon, 4/6 favourite
21 Aug 2025Vinnie Roe Stakes (Listed), Leopardstown1m 6fGood4th of 8
3 Oct 2025Noel Murless Stakes (Listed), Ascot1m 6f 34yGood to soft7th of 8
24 Apr 2026Handicap, Cork1m 2f 100yGood to yielding16th of 16
12 May 2026Conditions race, Killarney1m 6f 44yGood4th of 6
16 Jun 2026Ascot Stakes (Heritage Handicap), Royal Ascot2m 3f 210yGood to firm2nd of 20, beaten a head, 25/1
31 Jul 2026Goodwood Handicap2m 4f 137yGood to firmWon by 3 lengths, 11/4
23 Aug 2026Prix Kergorlay (G2), Deauville3000mSoft to heavyWon by 5.5 lengths, 9/2

Career: 9 starts, 3 wins, 1 second, 1 third. At 3000m and further: 3 starts, 2 wins and a head second.

The Kergorlay field was small, five runners, with Santorini Star second and Double Major another five lengths back in third. His official rating went from 94 at Royal Ascot to 98 at Goodwood and 106 after Deauville.

What is known about Defiantly

The change came with distance and blinkers. Over a mile and a half to a mile and six furlongs he was a fair handicapper who lost more often than he won. Once he was stepped up to 3000m and more in June, with blinkers fitted, he ran a head second and then won twice. Those are the trips that matter at Flemington.

He races on the pace. O'Brien compared him with Twilight Payment, his 2020 Cup winner, saying both go to the lead and are hard to pass. His jockey at Deauville described a strong stayer who does little in a race, stays behind the bridle and keeps responding, adding that he handles fast ground.

He has form on both kinds of ground. His Goodwood and Ascot runs came on good to firm; the Kergorlay was on soft to heavy. Spring going at Flemington can be either.

What he has not done. He has not raced outside Europe, has not run in a field bigger than 20, and has not met Australian stayers at weights set by their handicapper. He was in pre-export quarantine at the end of September, with the travel still ahead of him.

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Melbourne Cup 2026: chances and why

The Cup is a 3200m handicap for up to 24 runners. As of 5 October the races.com.au market showed him at around $9, ahead of the reigning winner Half Yours at $10 and Aeliana at $11.

Our estimate: about 10 per cent, a fair price near 9/1 ($10). This is our estimate, not a bookmaker price. It puts him at the head of our list, but barely above the market. Why:

  1. The right trip. Two wins and a head second at 3000m or more, and the longest of those races was further than the Cup.
  2. A workable weight. 56.5kg is two and a half kilograms below Half Yours and a kilogram and a half below Aeliana.
  3. The trainer. Joseph O'Brien has won the Cup twice, including with Twilight Payment in 2020, so the trip from Ireland is a route his stable has made work.
  4. Against him: a thin record in deep fields. One Group race win, in a five-runner race on heavy ground, is not the same as a Flemington Cup.
  5. Against him: the trip south. Every international horse has to travel and recover. Some handle it; not all reproduce their European form.

Our view: he is a fair favourite rather than a value bet at $9. We would look at him again if the price drifts to double figures after the field is declared.

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How to bet on Defiantly

  • Win, now or later. Ante-post prices are taken before the final field on Saturday 31 October. His ballot-exempt status removes one risk, but a scratching for any other reason usually loses an ante-post stake. Check how a price turns into a percentage with the odds calculator.
  • Each way. With a big field, the place part pays out far more often than the win part. Place terms differ between sites on the Cup, and the each-way calculator shows what each set of terms is worth.
  • Leading-international markets. Some sites may offer a market on the best-placed overseas-trained runner. That is a narrower contest than the whole race, and Defiantly would be one of the shorter prices in it.
  • Starting price. If you would rather wait for the parade, an SP bet follows the market to the off and is not hit by Rule 4.

Our guide to racing bet settlement explains Rule 4 and why the number of runners changes the place terms.

Where to watch

Flemington's Cup Day goes out live on national broadcasters in Australia, and racing channels with rights carry it abroad, including in Ireland, where he is trained. Some betting sites also show Australian racing to account holders. We list sites where that feature exists; which meetings are included changes from site to site, so check before the day.

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Is Defiantly sure to run in the Melbourne Cup?
He is ballot-exempt after winning the Prix Kergorlay, which carried a Melbourne Cup golden ticket, and he was still in the race after first acceptances on 29 September. Like any horse, he can still be scratched before the final field on 31 October.
Who trains Defiantly?
Joseph O'Brien in Ireland, who has already won the Melbourne Cup twice. The horse races for Australian Bloodstock, who bought him privately in 2026.
What weight does Defiantly carry?
56.5kg, allocated when weights were released on 17 September 2026. Half Yours is top weight on 59kg and Aeliana has 58kg.
What are his chances?
Our estimate is about 10 per cent, a fair price of around 9/1. That is our opinion, not a bookmaker price. He is the market leader, which fits his summer form, but he has never raced in Australia.
Who rode him in the Kergorlay?
Dylan Browne McMonagle, who also rode him at Goodwood. His Melbourne Cup jockey had not been confirmed as of 5 October.

Where this comes from

  1. Colour, sex, foaling date, owner, trainer, sire, dam, damsire; full race record with dates, distances, going, prices, official ratings, headgearsportinglife.com/racing/profiles/horse/11828912026-10-05
  2. Race record, Kergorlay result and marginbreednet.com.au/horse/defiantly2026-10-05
  3. Breeder Qatar Racing, sale history, half-siblings Middle Earth and Buckaroo, trainer comment on Melbournebreednet.com.au (Blueblood stayer announces Melbourne Cup credentials)2026-10-05
  4. Kergorlay 23 August 2026, 5.5 lengths, jockey quote, ballot-exempt entryvrc.com.au (Joseph O'Brien locks another Cup contender at Deauville)2026-10-05
  5. Owner Australian Bloodstock, trainer comparison with Twilight Paymentracingpost.com (Kergorlay report)2026-10-05
  6. Weight 56.5kg and first in order of entrythestraight.com.au (2026 Melbourne Cup ballot order)2026-10-05
  7. Race date, distance, prize money, first acceptances, quarantine, market prices, O'Brien dual Cup winnerraces.com.au (Melbourne Cup page, nominations and first acceptances reports)2026-10-05
  8. Twilight Payment won the 2020 Melbourne Cup for Joseph O'Brienen.wikipedia.org/wiki/2020_Melbourne_Cup2026-10-05
  9. Middle Earth third in 2025 Melbourne Cup; field limit of 24en.wikipedia.org (2025 Melbourne Cup; Melbourne Cup)2026-10-05

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