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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
Dale Koler 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Marcos A. Serrano 4 17 4.25 1 1 5 5.88% 41.18% $9,510 $559 $2,378 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
Dale Koler 1 4 4 0 0 0 0% 0% $830 $208 $830 0 0
Marcos A. Serrano 9 35 3.89 2 1 3 5.71% 17.14% $13,350 $381 $1,483 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
Dale Koler 1 2 2 1 0 1 50% 100% $7,878 $3,939 $7,878 0 0
Marcos A. Serrano 21 117 5.57 9 13 17 7.69% 33.33% $82,422 $704 $3,925 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
Dale Koler 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Marcos A. Serrano 22 92 4.18 9 13 12 9.78% 36.96% $70,248 $764 $3,193 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
Dale Koler 3 8 2.67 1 3 2 12.5% 75% $13,665 $1,708 $4,555 0 0
Marcos A. Serrano 9 36 4 4 3 4 11.11% 30.56% $28,284 $786 $3,143 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
Dale Koler 2 9 4.5 1 2 4 11.11% 77.78% $11,431 $1,270 $5,716 0 0
Marcos A. Serrano 13 46 3.54 0 4 6 0% 21.74% $13,636 $296 $1,049 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
Dale Koler 3 10 3.33 2 2 1 20% 50% $12,301 $1,230 $4,100 0 0
Marcos A. Serrano 4 25 6.25 3 2 2 12% 28% $16,200 $648 $4,050 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
Dale Koler 3 6 2 0 1 0 0% 16.67% $2,400 $400 $800 0 0
Marcos A. Serrano 11 59 5.36 5 4 7 8.47% 27.12% $35,812 $607 $3,256 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
Dale Koler 1 5 5 1 0 1 20% 40% $5,080 $1,016 $5,080 0 0
Marcos A. Serrano 6 51 8.5 2 10 4 3.92% 31.37% $29,380 $576 $4,897 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
Dale Koler 2 7 3.5 1 1 0 14.29% 28.57% $6,750 $964 $3,375 0 0
Marcos A. Serrano 9 38 4.22 3 4 5 7.89% 31.58% $26,237 $690 $2,915 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
Dale Koler 2 9 4.5 0 1 0 0% 11.11% $4,278 $475 $2,139 0 0
Marcos A. Serrano 24 77 3.21 6 11 8 7.79% 32.47% $45,772 $594 $1,907 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
Dale Koler 3 16 5.33 0 0 2 0% 12.5% $5,595 $350 $1,865 0 0
Marcos A. Serrano 9 46 5.11 6 7 9 13.04% 47.83% $33,333 $725 $3,704 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
Dale Koler 2 12 6 1 2 1 8.33% 33.33% $7,420 $618 $3,710 0 0
Marcos A. Serrano 8 41 5.13 7 7 5 17.07% 46.34% $28,609 $698 $3,576 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
Dale Koler 5 24 4.8 2 4 2 8.33% 33.33% $16,537 $689 $3,307 0 0
Marcos A. Serrano 13 49 3.77 7 2 5 14.29% 28.57% $31,690 $647 $2,438 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
Dale Koler 2 10 5 2 2 1 20% 50% $10,434 $1,043 $5,217 0 0
Marcos A. Serrano 8 56 7 4 10 4 7.14% 32.14% $59,235 $1,058 $7,404 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
Dale Koler 3 19 6.33 2 0 5 10.53% 36.84% $10,304 $542 $3,435 0 0
Marcos A. Serrano 11 65 5.91 6 7 7 9.23% 30.77% $59,752 $919 $5,432 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
Dale Koler 3 12 4 1 1 1 8.33% 25% $5,595 $466 $1,865 0 0
Marcos A. Serrano 9 71 7.89 4 9 8 5.63% 29.58% $37,872 $533 $4,208 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
Dale Koler 2 14 7 0 1 1 0% 14.29% $4,392 $314 $2,196 0 0
Marcos A. Serrano 9 60 6.67 4 6 5 6.67% 25% $37,010 $617 $4,112 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
Dale Koler 2 15 7.5 0 1 0 0% 6.67% $2,489 $166 $1,245 0 0
Marcos A. Serrano 5 11 2.2 0 1 1 0% 18.18% $3,666 $333 $733 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
Dale Koler 2 12 6 3 2 4 25% 75% $19,185 $1,599 $9,593 0 0
Marcos A. Serrano 21 136 6.48 9 16 20 6.62% 33.09% $94,136 $692 $4,483 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
Dale Koler 2 11 5.5 0 3 0 0% 27.27% $4,932 $448 $2,466 0 0
Marcos A. Serrano 22 122 5.55 7 11 22 5.74% 32.79% $75,292 $617 $3,422 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
Dale Koler 2 12 6 3 0 0 25% 25% $11,527 $961 $5,764 0 0
Marcos A. Serrano 24 130 5.42 11 13 18 8.46% 32.31% $99,244 $763 $4,135 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
Dale Koler 2 9 4.5 1 0 0 11.11% 11.11% $3,347 $372 $1,674 0 0
Marcos A. Serrano 18 107 5.94 8 11 14 7.48% 30.84% $76,225 $712 $4,235 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
Dale Koler 3 16 5.33 0 1 1 0% 12.5% $2,259 $141 $753 0 0
Marcos A. Serrano 14 55 3.93 3 5 7 5.45% 27.27% $29,210 $531 $2,086 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
Dale Koler 5 27 5.4 2 1 1 7.41% 14.81% $11,011 $408 $2,202 0 0
Marcos A. Serrano 29 184 6.34 12 20 20 6.52% 28.26% $104,953 $570 $3,619 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
Dale Koler 2 17 8.5 1 1 4 5.88% 35.29% $7,492 $441 $3,746 0 0
Marcos A. Serrano 24 163 6.79 24 10 18 14.72% 31.9% $144,162 $884 $6,007 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
Dale Koler 3 14 4.67 0 1 3 0% 28.57% $5,103 $365 $1,701 0 0
Marcos A. Serrano 22 149 6.77 9 11 17 6.04% 24.83% $75,433 $506 $3,429 0 0