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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
Kenneth K. Chadborn, Jr. 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Mark Passley 5 17 3.4 1 1 3 5.88% 29.41% $40,230 $2,366 $8,046 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
Kenneth K. Chadborn, Jr. 4 8 2 2 1 2 25% 62.5% $34,469 $4,309 $8,617 0 0
Mark Passley 13 49 3.77 7 3 6 14.29% 32.65% $181,945 $3,713 $13,996 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
Kenneth K. Chadborn, Jr. 7 38 5.43 2 3 5 5.26% 26.32% $57,565 $1,515 $8,224 0 0
Mark Passley 6 30 5 2 3 3 6.67% 26.67% $58,140 $1,938 $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
Kenneth K. Chadborn, Jr. 3 13 4.33 0 3 3 0% 46.15% $33,696 $2,592 $11,232 0 0
Mark Passley 3 20 6.67 2 0 3 10% 25% $37,550 $1,878 $12,517 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
Kenneth K. Chadborn, Jr. 6 23 3.83 2 5 3 8.7% 43.48% $92,974 $4,042 $15,496 0 0
Mark Passley 10 24 2.4 2 2 2 8.33% 25% $44,530 $1,855 $4,453 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
Kenneth K. Chadborn, Jr. 5 11 2.2 0 1 3 0% 36.36% $13,614 $1,238 $2,723 0 0
Mark Passley 8 33 4.13 6 8 7 18.18% 63.64% $181,320 $5,495 $22,665 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
Kenneth K. Chadborn, Jr. 12 36 3 0 6 3 0% 25% $29,671 $824 $2,473 0 0
Mark Passley 12 39 3.25 3 4 1 7.69% 20.51% $56,530 $1,449 $4,711 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
Kenneth K. Chadborn, Jr. 12 55 4.58 5 6 9 9.09% 36.36% $64,667 $1,176 $5,389 0 0
Mark Passley 9 36 4 1 1 3 2.78% 13.89% $28,913 $803 $3,213 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
Kenneth K. Chadborn, Jr. 6 30 5 7 3 3 23.33% 43.33% $84,697 $2,823 $14,116 0 0
Mark Passley 10 45 4.5 2 4 6 4.44% 26.67% $83,403 $1,853 $8,340 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
Kenneth K. Chadborn, Jr. 6 25 4.17 2 5 6 8% 52% $44,969 $1,799 $7,495 0 0
Mark Passley 5 16 3.2 1 0 2 6.25% 18.75% $21,620 $1,351 $4,324 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
Kenneth K. Chadborn, Jr. 15 85 5.67 11 7 12 12.94% 35.29% $104,407 $1,228 $6,960 0 0
Mark Passley 7 36 5.14 3 8 2 8.33% 36.11% $65,240 $1,812 $9,320 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
Kenneth K. Chadborn, Jr. 22 75 3.41 5 5 10 6.67% 26.67% $78,834 $1,051 $3,583 0 0
Mark Passley 5 10 2 1 2 0 10% 30% $13,400 $1,340 $2,680 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
Kenneth K. Chadborn, Jr. 24 92 3.83 4 9 5 4.35% 19.57% $97,406 $1,059 $4,059 0 0
Mark Passley 16 76 4.75 5 8 10 6.58% 30.26% $81,715 $1,075 $5,107 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
Kenneth K. Chadborn, Jr. 19 88 4.63 9 13 8 10.23% 34.09% $101,823 $1,157 $5,359 0 0
Mark Passley 16 64 4 5 6 12 7.81% 35.94% $85,451 $1,335 $5,341 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
Kenneth K. Chadborn, Jr. 24 116 4.83 12 20 15 10.34% 40.52% $160,696 $1,385 $6,696 0 0
Mark Passley 14 79 5.64 18 16 9 22.78% 54.43% $194,998 $2,468 $13,928 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
Kenneth K. Chadborn, Jr. 18 86 4.78 9 12 15 10.47% 41.86% $112,452 $1,308 $6,247 0 0
Mark Passley 25 114 4.56 14 19 15 12.28% 42.11% $270,417 $2,372 $10,817 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
Kenneth K. Chadborn, Jr. 20 102 5.1 16 8 12 15.69% 35.29% $220,185 $2,159 $11,009 0 0
Mark Passley 20 91 4.55 16 3 13 17.58% 35.16% $223,462 $2,456 $11,173 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
2025 National Trainer Avg. 4 13.53% 40.55% $5,513 $22,031
Kenneth K. Chadborn, Jr. 19 62 3.26 8 4 5 12.9% 27.42% $119,468 $1,927 $6,288 0 0
Mark Passley 24 121 5.04 6 11 17 4.96% 28.1% $115,697 $956 $4,821 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
Kenneth K. Chadborn, Jr. 19 70 3.68 7 10 13 10% 42.86% $191,571 $2,737 $10,083 0 0
Mark Passley 14 86 6.14 11 10 14 12.79% 40.7% $115,740 $1,346 $8,267 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
Kenneth K. Chadborn, Jr. 30 132 4.4 15 16 19 11.36% 37.88% $263,053 $1,993 $8,768 0 0
Mark Passley 16 65 4.06 9 8 8 13.85% 38.46% $116,618 $1,794 $7,289 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
Kenneth K. Chadborn, Jr. 28 100 3.57 17 12 10 17% 39% $216,075 $2,161 $7,717 0 1
Mark Passley 17 73 4.29 7 7 6 9.59% 27.4% $126,425 $1,732 $7,437 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
Kenneth K. Chadborn, Jr. 23 119 5.17 21 19 17 17.65% 47.9% $203,385 $1,709 $8,843 0 0
Mark Passley 21 100 4.76 12 9 15 12% 36% $143,849 $1,438 $6,850 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
Kenneth K. Chadborn, Jr. 22 136 6.18 13 15 17 9.56% 33.09% $178,408 $1,312 $8,109 0 0
Mark Passley 17 104 6.12 11 13 16 10.58% 38.46% $100,177 $963 $5,893 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
Kenneth K. Chadborn, Jr. 26 132 5.08 11 11 13 8.33% 26.52% $139,575 $1,057 $5,368 0 0
Mark Passley 17 90 5.29 13 15 13 14.44% 45.56% $78,046 $867 $4,591 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
Kenneth K. Chadborn, Jr. 28 127 4.54 8 14 18 6.3% 31.5% $107,748 $848 $3,848 0 0
Mark Passley 11 41 3.73 8 6 5 19.51% 46.34% $52,553 $1,282 $4,778 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
Kenneth K. Chadborn, Jr. 27 107 3.96 12 6 16 11.21% 31.78% $132,038 $1,234 $4,890 0 1
Mark Passley 9 37 4.11 2 2 3 5.41% 18.92% $26,749 $723 $2,972 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
Kenneth K. Chadborn, Jr. 28 150 5.36 22 16 13 14.67% 34% $303,265 $2,022 $10,831 0 5
Mark Passley 10 39 3.9 3 5 4 7.69% 30.77% $39,082 $1,002 $3,908 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
Kenneth K. Chadborn, Jr. 25 140 5.6 27 16 22 19.29% 46.43% $203,027 $1,450 $8,121 0 1
Mark Passley 12 33 2.75 7 5 4 21.21% 48.48% $117,500 $3,561 $9,792 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
2025 National Trainer Avg. 4 13.53% 40.55% $5,513 $22,031
Kenneth K. Chadborn, Jr. 20 113 5.65 14 12 17 12.39% 38.05% $67,409 $597 $3,370 0 0
Mark Passley 10 50 5 8 6 1 16% 30% $88,473 $1,769 $8,847 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
Kenneth K. Chadborn, Jr. 15 73 4.87 12 17 12 16.44% 56.16% $94,662 $1,297 $6,311 0 1
Mark Passley 8 23 2.88 2 2 4 8.7% 34.78% $30,743 $1,337 $3,843 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
Kenneth K. Chadborn, Jr. 11 65 5.91 13 8 6 20% 41.54% $49,919 $768 $4,538 0 0
Mark Passley 4 16 4 2 1 1 12.5% 25% $11,462 $716 $2,866 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
Kenneth K. Chadborn, Jr. 1 1 1 1 0 0 100% 100% $1,620 $1,620 $1,620 0 0
Mark Passley 3 7 2.33 0 1 1 0% 28.57% $2,930 $419 $977 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
Kenneth K. Chadborn, Jr. 17 93 5.47 11 20 12 11.83% 46.24% $45,731 $492 $2,690 0 0
Mark Passley 1 3 3 0 0 0 0% 0% $490 $163 $490 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
Kenneth K. Chadborn, Jr. 15 55 3.67 8 8 4 14.55% 36.36% $22,278 $405 $1,485 0 0
Mark Passley 4 22 5.5 0 0 0 0% 0% $2,633 $120 $658 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
Kenneth K. Chadborn, Jr. 26 124 4.77 15 25 16 12.1% 45.16% $32,624 $263 $1,255 0 0
Mark Passley 8 33 4.13 2 3 3 6.06% 24.24% $26,100 $791 $3,263 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
Kenneth K. Chadborn, Jr. 22 113 5.14 14 13 9 12.39% 31.86% $28,720 $254 $1,305 0 0
Mark Passley 1 1 1 0 0 0 0% 0% $55 $55 $55 0 0