| John Stephens | Monmouth Park 27-Aug-23, Office Etiquette |
| John Stinebaugh | Sunland Park 20-Jan-25, Regal Intent |
| John Stubbs | Clifford Park 08-Jul-10, Hesanothadollar |
| John Sutton | Dalby 02-Oct-25, Roigard |
| John Swygart | |
| John Symons & Sheila Laxon | Aquis Park Gold Coast 08-May-21, Scratches |
| John Tarin | Warracknabeal 16-Aug-25, Tarin's Rock |
| John Taylor | Wodonga 07-Feb-20, Hargy |
| John Tebbutt | Finger Lakes 25-May-23, Luscious Lola |
| John Thom | Sandown Hillside 01-Oct-25, Male Model |
| John Thomas | Toowoomba 18-Oct-25, Expectant |
| John Thompson | Nowra 19-Oct-25, Deep Affection |
| John Trumper | Cambridge 28-Aug-24, Talika |
| John Tyack | Brewarrina 15-May-21, Sam |
| John Vandermyle | Port Augusta 26-Jun-16, I Like Me |
| John Vinson | Gulfstream 26-Jul-25, Money Trail |
| John Volpe | Laurel Park 20-Oct-25, Heart Of Gold |
| John W Bell | Ellerslie 18-Oct-25, Cleese |
| John W Collins | Beaudesert 28-Dec-13, Beyond Imagination |
| John W Ramsey | Muswellbrook 20-Oct-25, Shine Your Light |
| John W Thomas | Swan Hill 24-Aug-25, Rustic Elegance |
| John Wainwright | Fairmount Park 18-Jun-25, Recause |
| John Wallace | Gold Coast 18-Oct-25, Starsarise |
| John Walters | Charles Town 29-Mar-25, Cora's Choice |
| John Watson | Bunbury 26-Nov-17, River Justice |
| John Wearing | Oakley 11-May-24, American General |
| John Whalen | Woodbine 13-Dec-24, Key Stroke |
| John Wheeler | Hawera 04-Oct-25, Keen On Bubbles |
| John Whitelaw | bet365 Benalla 17-Dec-22, Vancouver Express |
| John Whyte | |
| John Wiese | Fairmount Park 22-Oct-25, Smooth N Silky |
| John Wigginton | Rockhampton 28-Aug-25, Electric Brae |
| John Wilcock | Aquis Park Gold Coast 22-May-19, Court's Star |
| John Williams | Te Aroha 21-Sep-25, Beau Ondago |
| John Winston | Tramore 06-Dec-22, Swift Sonnet |
| John Witthauer | Fairmount Park 11-Oct-23, Hey Ma |
| John Worsley | Delaware Park 06-Jul-23, Singlino |
| John Zielke | Sunshine Coast 10-Oct-25, Kalamia King |
| Johnathon Feron | Delaware Park 19-Oct-25, You Kidding Me |
| Johnnie L Roberts | Wyong 30-Apr-20, Feelin' Alright |
| Johnny Collins | Gulfstream 06-Oct-25, Ragman |
| Johnny Hernandez | Lone Star 29-Apr-24, Kitchen Match |
| Johnny Singh | Sunray Park 26-May-25, Hazhoni |
| Johnny Soto | Zia Park 11-Dec-23, Bp Valiant Eagle |
| Johno Benner | Waverley 19-Oct-25, Croix De Guerre |
| Joji Tanaka | Kochi 19-Oct-25, Ho O Levain |
| Joline Turner | Stony Creek 29-Dec-12, SULLIVANS COVE |
| Jon Arnett | Canterbury Park 02-Jun-25, City Time |
| Jon Jazdzewski | Keeneland 06-Oct-25, A Little Patience |
| Jon Miller | Te Aroha 22-Oct-25, Shining Pearl |
| Jon O'Connor | Murray Bdge 11-Oct-25, San Lucido |
| Jon Taylor | Birdsville 06-Sep-25, Lip Sip Suk |
| Jon Walk | Sunshine Coast 02-Feb-25, Superargo |
| Jon Zimmerman | Turf Paradise 08-Jan-25, Baron's Song |
| Jonah Fuselier | Fair Grounds 21-Mar-25, Chad's Flash |
| Jonas Gibson | Oaklawn Park 27-Apr-25, Therideofalifetime |
| Jonas Guerra | |
| Jonatan Baustian | San Isidro 12-Oct-23, Ay Eduardo |
| Jonatan D Baustian | Palermo 29-Oct-23, Renacuajo Si |
| Jonathan Bello | San Isidro 03-Apr-25, Cabala Stripes |
| Jonathan Buckley | Finger Lakes 14-Oct-25, Redhotnotbothered |
| Jonathan Castaneda | Lone Star Park 19-Oct-25, Kartendo Fast Dash |
| Jonathan Charles | Fair Grounds 22-Jan-24, Lookin At Betty |
| Jonathan Fredes | San Isidro 14-Nov-24, Dalham |
| Jonathan Fren | San Isidro 31-Aug-23, Juana De Oro |
| Jonathan G G | Concepcion 05-Jul-23, Rujidor |
| Jonathan Maldonado | Laurel Park 13-Oct-25, Candycrumbs |
| Jonathan Morales | San Isidro 15-May-25, Thanks Guy |
| Jonathan Nance | Horseshoe Indianapolis 14-Oct-25, Mordecai |
| Jonathan O Fredes | Palermo 04-Nov-23, Oficial Maharaja |
| Jonathan Smith | Coffs Harbour 14-Sep-25, Counterpart |
| Jonathan Sweeney | Galway 03-Aug-25, Jisco Du Brem |
| Jonathan Thomas | Keeneland 16-Oct-25, Judith |
| Jonathan Wong | Fair Grounds 24-Mar-25, Agatino |
| Jonathanie Badillo | Charles Town 08-Jan-23, Miss Corey |
| Jonathon Jachmann | Northam 05-Oct-25, First Law |
| Jonny Field | Gold Coast 30-Aug-25, Monte Carlo Miss |
| Jordan Blair | Keeneland 20-Oct-25, Twirling Troillet |
| Jordan Bullock | Penn National 14-Jun-25, Mastermind |
| Jordan Frew | Morphettville Parks 20-Apr-24, High 'n' Dry |
| Jordan Lay | Woodbine 14-Dec-24, Barons Blitz |
| Jordan Lee | Grafton 21-Oct-25, Gavin |
| Jordan Rogan | Hawera 15-Jul-25, Snipsnap |
| Jordan Rolfe | Geraldton 12-Oct-25, Endless Joy |
| Jorden McMahon | Port Augusta 23-May-25, Sir Panama |
| Jorge A Neer | Palermo 14-Nov-23, Grosso Amor |
| Jorge Abreu | Belmont At The Big A 15-Sep-25, Moonage Daydream |
| Jorge B Mansilla | Palermo 30-May-23, Norma Poupee |
| Jorge Barrera | Sam Houston Race Park 30-Apr-23, Blackjess |
| Jorge Bautista | Los Alamitos Racecourse 20-Oct-25, Lochmara |
| Jorge Berho | San Isidro 13-Jun-24, Melodia Tanguera |
| Jorge Brito | Zia Park 04-Dec-23, Apollitical Whiplash |
| Jorge C Gomez | Palermo 25-Jul-23, Embrujaba |
| Jorge Cabrera | San Isidro 31-Aug-23, Irish Lucky |
| Jorge Carreras | San Isidro 02-Sep-23, Nothing Better |
| Jorge Carrizo | San Isidro 01-May-25, Misionera Scat |
| Jorge Chanqueo | Club Hipico Santiago 20-May-25, Daddy Rooster |
| Jorge Coman | |
| Jorge Comba | San Isidro 23-Nov-23, Tua Hee |
| Jorge Congestre | San Isidro 15-May-25, Consejero Espanol |