We are seeing quite a few training partnerships emerge as people look to split duties officially, working in tandem with a bunch of horses. One of the ones that really caught my eye in recent years was the partnership between Oliver Greenall and Josh Guerriero, who have proven to be quite a dynamic duo.
They’ve got a strong understanding of what’s needed, and also plenty of youthful energy to try out new ideas and work out how they’re going to conquer the sport. They’ve quickly gained a fan base and respect from others.
Oliver Greenall
Beginning with Oliver, he comes from a true racing family. He was a successful amateur jockey before turning to training, winning the amateur title in 2007.
After that, he would move to his own training operation in Cheshire, where he would focus on national hunt horses, in particular looking at younger jumps horses, and finding ways to win with them.
Josh Guerriero
Josh Guerriero is also a former jockey, he’s the one bringing more of a tactical approach to the training program. He’s a big believer in working out how to improve horses and get them winning races when others have failed to do so.
For this reason, he’s been known to buy many cheap cast-offs, but get them winning, even if it was at a low level.
Oliver Greenall & Josh Guerriero Grand National Wins
Oliver Greenall & Josh Guerriero has never trained a horse that has won the Grand National.
Their best finish to date was in 2025 with Iroko ridden by Jonjo O’Neill Jr who came 4th.
Full Results
| Year | Horse | Result | Prize Money | Jockey |
|---|---|---|---|---|
| 2025 | Iroko | 4 | £65,000 | Jonjo O’Neill Jr |
Partnership Officially Starts in 2022
It was in 2022 when the partnership would officially start, working under the name Greenall & Guerriero Racing. Beginning small, they quickly found their feet, combining racing knowledge with the skills to make their string work, buying cheap, finding ways to win, and being known for their excellent race planning.
Some of their biggest success stories have come from taking horses on a downward spiral, without a win for some time, and rejuvenating them to bring them back into the winner’s enclosure.
Slowly, this has allowed them to operate at a higher level, and thanks to getting some very good owners on board, they’ve been allowed to keep moving towards the top end of racing.
Regular runners at the Cheltenham Festival allowed them to really get on the map, and they would make their Aintree debut in 2025, with the JP McManus-owned Iroko.
The fact that they’ve got horses from McManus is a strong positive for them and shows where they’ve already got to in the game.
Iroko also showed up really well for them, he was well backed, spoken about a lot before the race, and would finish in 4th place, the first UK runner home, and the first non-Mullins trained runner too.
They’ll be looking to build on their success and their first step into the Grand National by having further runners, and maybe even a winner, in the next few years.