| Antonio Machado | Laurel Park
07-Sep-25,
Estocada |
| Antonio Martinez | Sam Houston Race Park
23-Apr-23,
Patterns Of Insanity |
| Antonio Meraz | Hawthorne
27-Oct-25,
Anna After Midnite |
| Antonio R Said | Palermo
09-Oct-23,
Fresh Colours |
| Antonio Sano | Gulfstream
02-Mar-26,
Reminder |
| Antonio Soto | Turf Paradise
01-Mar-26,
Kamikaze Blue |
| Antony Alder | Echuca
10-Aug-25,
Panagsama |
| Antony Fuller | Ellerslie
21-Feb-26,
Khan Hunter |
| Antwain Ernest Franklin | Lone Star Park
16-Nov-25,
Mr Bordertown Buzz |
| Antwain Franklin | Lone Star Park
23-Oct-22,
Rare Agouti Jm |
| April Cornell | Port Lincoln
11-Nov-22,
Chasing Stars |
| Aquilano | San Isidro
08-Feb-24,
Taimyra |
| Aracely Mejia | Lone Star Park
15-Nov-25,
Ms Easter Deb |
| Araki Michiya | Kasamatsu
06-Feb-26,
Land Sur |
| Arcadio Lopez | Finger Lakes
26-Nov-25,
Sutton Breeze |
| Archibald J. Kingsley, Jr. | Belmont At The Big A
19-Sep-25,
Bee Well |
| Archibald Kingsley, Jr | Colonial Downs
18-Jul-25,
Florianopolis |
| Archie Alexander | Colac
01-Mar-26,
Prince Ziotta |
| Archie Harrison | Townsville
10-Apr-18,
Chomaru |
| Archie Watson | |
| Ariane Wilson | Presque Isle Downs
24-Oct-24,
Straight Madness |
| Ariel A Roble | |
| Ariel E Murillo | Palermo
18-Jun-23,
Mata Compadronas |
| Ariel H Torres | Palermo
29-Oct-23,
No Te Enoja |
| Ariel Lusardi | San Isidro
09-Dec-24,
Lo Straniero |
| Ariel Pereyra | San Isidro
09-Jun-24,
Santigalo |
| Ariel Viera | San Isidro
26-Apr-25,
Buenissimo Soy |
| Ariel Yllodo | San Isidro
11-Jan-24,
Danigen |
| Arizona Miller | Mahoning Valley
09-Jan-24,
Royal Coup |
| Arjun Mangalorkar | Chennai
01-Mar-25,
Disciple |
| Armand & Leon Lotz | Fairview
06-Feb-26,
Shori Kai |
| Armand Concessi | Fort Erie
15-Oct-24,
Thelonious |
| Armando Alamos | Sunland Park
01-Mar-26,
Docs Game |
| Armando B B | Concepcion
06-Nov-24,
Milan |
| Armando C Glades | San Isidro
18-Jan-24,
California Mani |
| Armando Castellanos | Turf Paradise
17-Feb-26,
Nonika Cartel |
| Armando Cervantes | San Isidro
24-Jun-24,
The Zorro |
| Armando De | Gulfstream
10-Feb-25,
Cerchi |
| Armando De La Cerda | Gulfstream
27-Feb-26,
Brown Diamond |
| Armando Glades | San Isidro
15-May-25,
Big Tiger |
| Armando Hernandez | Oaklawn Park
02-Mar-26,
Devil's Tower |
| Armando J J | Hipodromo Chile
09-May-25,
Exagerada Y Buena |
| Armando J Pacheco | Palermo
14-Nov-23,
May Carleton |
| Armando Moreno | San Isidro
14-Apr-24,
Sol Tenvour |
| Armando Navarrete | Concepcion
18-Dec-24,
Volko |
| Armando Pacheco | San Isidro
27-Jun-24,
Mago De Cabral |
| Armando Quintanilla | Zia Park
18-Dec-23,
Hock It Is |
| Armin H. Quiroz, Jr. | Sunland Park
07-Feb-26,
Legal Separation |
| Armin Quiroz | Sunland Park
06-Apr-24,
Gray Eagle Moon |
| Armonte Craig | Charles Town
28-Mar-25,
Remys Showtime |
| Arn Nicolas | Compiegne
13-Jul-23,
Pikatsu |
| Arnaldo Vigil | San Isidro
06-Oct-24,
Carriera |
| Arnaud Delacour | Gulfstream
21-Feb-26,
Independenceavenue |
| Arno Junior | Gavea
09-Apr-25,
Warrant Officer |
| Arnold G. Herrera | Lone Star Park
18-May-25,
Win Worthy |
| Arnold Lewis | Zia Park
15-Dec-25,
Dazzlin Drama |
| Arnold Morales | Remington Park
15-Dec-23,
Dare To Be Wild |
| Arnold Torres | Santa Anita
18-Mar-25,
Lion's Lair |
| Arnoldo Bustamante | San Isidro
04-Jul-24,
Lealdad |
| Arnoldo Encina | San Isidro
01-Jun-23,
Lujo Argentino |