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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
2025 National Trainer Avg. 4 13.53% 40.55% $5,513 $22,031
Marcus O'Donnell 9 28 3.11 3 2 1 10.71% 21.43% $107,842 $3,852 $11,982 0 0
Tina Chamberlin 3 8 2.67 0 1 0 0% 12.5% $5,367 $671 $1,789 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
2025 National Trainer Avg. 4 13.53% 40.55% $5,513 $22,031
Marcus O'Donnell 11 33 3 3 7 8 9.09% 54.55% $147,419 $4,467 $13,402 0 0
Tina Chamberlin 7 34 4.86 2 3 3 5.88% 23.53% $31,783 $935 $4,540 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
2025 National Trainer Avg. 4 13.53% 40.55% $5,513 $22,031
Marcus O'Donnell 1 1 1 0 0 0 0% 0% $170 $170 $170 0 0
Tina Chamberlin 6 36 6 2 5 4 5.56% 30.56% $47,047 $1,307 $7,841 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
2025 National Trainer Avg. 4 13.53% 40.55% $5,513 $22,031
Marcus O'Donnell 4 17 4.25 2 1 1 11.76% 23.53% $58,573 $3,445 $14,643 0 0
Tina Chamberlin 7 22 3.14 4 1 5 18.18% 45.45% $67,832 $3,083 $9,690 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
2025 National Trainer Avg. 4 13.53% 40.55% $5,513 $22,031
Marcus O'Donnell 5 15 3 0 1 4 0% 33.33% $10,526 $702 $2,105 0 0
Tina Chamberlin 3 20 6.67 1 4 2 5% 35% $17,477 $874 $5,826 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
2025 National Trainer Avg. 4 13.53% 40.55% $5,513 $22,031
Marcus O'Donnell 3 25 8.33 2 6 2 8% 40% $35,162 $1,406 $11,721 0 0
Tina Chamberlin 1 1 1 0 0 0 0% 0% $105 $105 $105 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
2025 National Trainer Avg. 4 13.53% 40.55% $5,513 $22,031
Marcus O'Donnell 5 26 5.2 2 1 2 7.69% 19.23% $23,349 $898 $4,670 0 0
Tina Chamberlin 3 13 4.33 0 0 3 0% 23.08% $4,685 $360 $1,562 0 0