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Trainer Comparison

Statistics by Year:
Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 2 3 1.5 0 1 0 0% 33.33% $5,750 $1,917 $2,875 0 0
Aidan P. O'Brien 8 10 1.25 3 0 0 30% 30% $2,861,000 $286,100 $357,625 3 3

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 6 17 2.83 1 1 5 5.88% 41.18% $72,708 $4,277 $12,118 0 0
Aidan P. O'Brien 11 12 1.09 4 2 1 33.33% 58.33% $4,252,500 $354,375 $386,591 4 4

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 3 5 1.67 1 2 0 20% 60% $27,420 $5,484 $9,140 0 0
Anthony T. Quartarolo 6 51 8.5 5 7 5 9.8% 33.33% $185,995 $3,647 $30,999 0 0
Aidan P. O'Brien 9 13 1.44 3 1 2 23.08% 46.15% $3,253,500 $250,269 $361,500 3 3

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 22 81 3.68 6 9 18 7.41% 40.74% $273,125 $3,372 $12,415 0 0
Aidan P. O'Brien 11 18 1.64 3 2 1 16.67% 33.33% $2,614,228 $145,235 $237,657 3 3

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 1 2 2 0 0 1 0% 50% $4,700 $2,350 $4,700 0 0
Anthony T. Quartarolo 25 86 3.44 6 10 14 6.98% 34.88% $304,011 $3,535 $12,160 0 0
Aidan P. O'Brien 12 13 1.08 1 5 1 7.69% 53.85% $3,249,000 $249,923 $270,750 1 1

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 1 4 4 0 2 0 0% 50% $14,102 $3,526 $14,102 0 0
Anthony T. Quartarolo 64 200 3.13 16 26 15 8% 28.5% $1,051,679 $5,258 $16,432 0 0
Aidan P. O'Brien 21 33 1.57 0 5 4 0% 27.27% $2,857,247 $86,583 $136,059 0 0

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 69 182 2.64 23 19 16 12.64% 31.87% $1,238,663 $6,806 $17,952 0 2
Aidan P. O'Brien 22 36 1.64 2 2 4 5.56% 22.22% $3,674,400 $102,067 $167,018 2 2

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 25 63 2.52 4 2 8 6.35% 22.22% $202,391 $3,213 $8,096 0 0
Aidan P. O'Brien 25 34 1.36 2 5 4 5.88% 32.35% $3,855,623 $113,401 $154,225 1 2

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 11 49 4.45 2 5 3 4.08% 20.41% $149,708 $3,055 $13,610 0 0
Aidan P. O'Brien 18 23 1.28 2 2 3 8.7% 30.43% $4,176,822 $181,601 $232,046 2 2

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 24 104 4.33 4 11 11 3.85% 25% $262,372 $2,523 $10,932 0 0
Aidan P. O'Brien 11 12 1.09 3 1 1 25% 41.67% $2,789,003 $232,417 $253,546 3 3

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 25 115 4.6 7 9 15 6.09% 26.96% $451,067 $3,922 $18,043 0 0
Aidan P. O'Brien 13 15 1.15 1 2 0 6.67% 20% $1,186,520 $79,101 $91,271 1 1

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 15 108 7.2 5 10 6 4.63% 19.44% $310,952 $2,879 $20,730 0 0
Aidan P. O'Brien 11 13 1.18 3 1 1 23.08% 38.46% $6,564,667 $504,974 $596,788 3 3

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 7 57 8.14 6 13 7 10.53% 45.61% $381,666 $6,696 $54,524 0 0
Aidan P. O'Brien 14 22 1.57 2 2 2 9.09% 27.27% $4,298,711 $195,396 $307,051 2 2

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 5 29 5.8 6 3 5 20.69% 48.28% $174,853 $6,029 $34,971 0 1
Aidan P. O'Brien 17 25 1.47 7 2 2 28% 44% $5,351,315 $214,053 $314,783 7 7

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 8 19 2.38 3 1 3 15.79% 36.84% $104,840 $5,518 $13,105 0 1
Aidan P. O'Brien 6 6 1 1 0 0 16.67% 16.67% $1,219,174 $203,196 $203,196 1 1

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Aidan P. O'Brien 9 9 1 1 1 0 11.11% 22.22% $406,800 $45,200 $45,200 0 1

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Aidan P. O'Brien 10 10 1 0 4 1 0% 50% $1,838,850 $183,885 $183,885 0 0

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Aidan P. O'Brien 9 9 1 0 2 0 0% 22.22% $891,664 $99,074 $99,074 0 0

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Aidan P. O'Brien 8 11 1.38 1 1 2 9.09% 36.36% $760,796 $69,163 $95,100 1 1

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Aidan P. O'Brien 10 17 1.7 2 1 1 11.76% 23.53% $1,911,847 $112,462 $191,185 2 2

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Aidan P. O'Brien 11 17 1.55 0 1 6 0% 41.18% $1,409,078 $82,887 $128,098 0 0

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Aidan P. O'Brien 10 15 1.5 2 3 3 13.33% 53.33% $2,528,032 $168,535 $252,803 2 2

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 6 21 3.5 1 1 4 4.76% 28.57% $28,742 $1,369 $4,790 0 0
Aidan P. O'Brien 12 15 1.25 3 2 2 20% 46.67% $3,307,391 $220,493 $275,616 3 3

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 3 5 1.67 0 0 1 0% 20% $2,640 $528 $880 0 0
Aidan P. O'Brien 10 16 1.6 2 2 2 12.5% 37.5% $2,045,375 $127,836 $204,538 2 2

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 29 76 2.62 12 9 10 15.79% 40.79% $114,694 $1,509 $3,955 0 0
Aidan P. O'Brien 10 13 1.3 2 2 0 15.38% 30.77% $1,850,856 $142,374 $185,086 2 2

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 17 115 6.76 17 19 11 14.78% 40.87% $318,497 $2,770 $18,735 0 0
Aidan P. O'Brien 5 5 1 0 0 1 0% 20% $81,920 $16,384 $16,384 0 0

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Anthony T. Quartarolo 8 79 9.88 9 11 12 11.39% 40.51% $154,270 $1,953 $19,284 0 0
Aidan P. O'Brien 1 1 1 0 0 0 0% 0% $0 $0 $0 0 0

Name Starters Starts Starts/
Starter 		1st 2nd 3rd Win % % 1st, 2nd or 3rd Earned Avg Earnings per Start Avg Earnings Per Starter Graded Stakes Win All Black-Type Win
2023 National Trainer Avg. 3.96 13.53% 40.55% $5,237 $20,757
Mary Rowan 3 10 3.33 0 3 1 0% 40% $2,423 $242 $808 0 0
Anthony T. Quartarolo 24 135 5.63 20 16 22 14.81% 42.96% $256,040 $1,897 $10,668 0 0
Aidan P. O'Brien 1 1 1 0 0 0 0% 0% $0 $0 $0 0 0