| 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 |
| Arlene Mccanns | Charles Town
12-Sep-26,
Cano's Baby |
| Armand / Leon Lotz | Fairview
18-Sep-26,
Shori Kai |
| Armand & Leon Lotz | Vaal
03-Sep-26,
Miss Fire Arrow |
| Armand Concessi | Fort Erie
15-Oct-24,
Thelonious |
| Armando Alamos | Sunray Park
17-May-26,
Apollitical Slates |
| Armando B B | Concepcion
06-Nov-24,
Milan |
| Armando C Glades | San Isidro
18-Jan-24,
California Mani |
| Armando Castellanos | Turf Paradise
03-May-26,
Dancing To Race |
| Armando Cervantes | San Isidro
24-Jun-24,
The Zorro |
| Armando De | Gulfstream
10-Feb-25,
Cerchi |
| Armando De La Cerda | Gulfstream
12-Sep-26,
Musical Journey |
| Armando Glades | San Isidro
15-May-25,
Big Tiger |
| Armando Hernandez | Horseshoe Indianapolis
16-Sep-26,
Thiever |
| 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. | Ruidoso Downs
09-Jun-25,
Zulu Cartel |
| 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 | Belmont Park
20-Sep-26,
Life's Dynamic |
| Arno Junior | Gavea
09-Apr-25,
Warrant Officer |
| Arnold G. Herrera | Lone Star Park
20-Sep-26,
Jc Canelo |
| Arnold Lewis | Lone Star Park
19-Sep-26,
Mako Shark Watters |
| 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 |
| Arnoud Dobber | Tampa Bay Downs
23-Mar-25,
D City Girl |
| Arnoud W. Dobber | Gulfstream
14-Sep-26,
Candy Road |
| Arnulfo Ascencio | Sunray Park
22-Apr-23,
Relentless Dean |
| Arnulfo Cardenas | Sunray Park
18-May-26,
Jm Call Me Special |
| Arnulfo Rangel | Mountaineer
30-May-23,
Willymar |
| Arolfo Vicente | San Isidro
22-Jun-23,
La Fontan |
| Arthur A. Coontz | Fairmount Park
13-Sep-26,
Into Golden Road |
| Arthur Agostini | Delaware Park
22-Jun-25,
Thank The Academy |
| Arthur Coontz | Fairmount Park
13-Sep-26,
Hanabi |
| Arthur Craig | Moree
23-Jul-15,
Barista Miss |
| Arthur Goulding | Ballinrobe
26-Aug-25,
Abel Mabel |
| Arthur Howlett | Moruya
17-Jan-05,
Bush Flash |
| Arthur Lucero | Sunland Park
13-Jan-25,
Leave It To Corona |
| Arthur Mortimer | Ascot
22-Nov-25,
Sir Duskin |
| Arthur Murphy | Ararat
28-Jan-21,
Golden Lance |
| Arthur O. Agostini | Delaware Park
19-Sep-26,
Winooski |
| Arthur Pace | Echuca
19-Sep-26,
Manhattan Darling |
| Arthur Ray Lucero | Sunray Park
17-May-26,
Finglas Lad |
| Arturo A Arrospide | San Isidro
07-May-23,
Batty Mayor |
| Arturo Arrospide | Palermo
04-May-24,
Doctor Navarro |