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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
Carlos A. Rivera 3 18 6 0 0 2 0% 11.11% $3,642 $202 $1,214 0 0
Bonnie Birzer 31 102 3.29 12 15 11 11.76% 37.25% $323,875 $3,175 $10,448 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
Carlos A. Rivera 3 22 7.33 1 1 3 4.55% 22.73% $8,896 $404 $2,965 0 0
Bonnie Birzer 54 223 4.13 35 31 43 15.7% 48.88% $703,578 $3,155 $13,029 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
Carlos A. Rivera 6 21 3.5 0 0 3 0% 14.29% $5,336 $254 $889 0 0
Bonnie Birzer 46 194 4.22 32 24 38 16.49% 48.45% $591,212 $3,047 $12,852 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
Carlos A. Rivera 6 24 4 1 1 1 4.17% 12.5% $8,290 $345 $1,382 0 0
Bonnie Birzer 38 161 4.24 24 28 18 14.91% 43.48% $589,153 $3,659 $15,504 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
Carlos A. Rivera 7 28 4 1 2 1 3.57% 14.29% $10,604 $379 $1,515 0 0
Bonnie Birzer 35 186 5.31 33 28 35 17.74% 51.61% $561,808 $3,020 $16,052 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
Carlos A. Rivera 12 44 3.67 2 9 4 4.55% 34.09% $30,416 $691 $2,535 0 0
Bonnie Birzer 15 73 4.87 10 17 12 13.7% 53.42% $280,474 $3,842 $18,698 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
Carlos A. Rivera 4 14 3.5 0 0 0 0% 0% $960 $69 $240 0 0
Bonnie Birzer 7 25 3.57 3 2 4 12% 36% $70,803 $2,832 $10,115 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
Carlos A. Rivera 9 39 4.33 5 9 1 12.82% 38.46% $33,792 $866 $3,755 0 0
Bonnie Birzer 1 3 3 0 2 0 0% 66.67% $7,296 $2,432 $7,296 0 0