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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
David Markgraf 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Sam B. David, Jr. 35 118 3.37 20 21 22 16.95% 53.39% $696,290 $5,901 $19,894 0 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
2025 National Trainer Avg. 4 13.53% 40.55% $5,513 $22,031
David Markgraf 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Sam B. David, Jr. 45 193 4.29 28 32 23 14.51% 43.01% $922,865 $4,782 $20,508 0 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
2025 National Trainer Avg. 4 13.53% 40.55% $5,513 $22,031
David Markgraf 10 33 3.3 2 2 1 6.06% 15.15% $33,450 $1,014 $3,345 0 0
Sam B. David, Jr. 48 206 4.29 35 27 35 16.99% 47.09% $932,680 $4,528 $19,431 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
David Markgraf 26 75 2.88 14 7 10 18.67% 41.33% $189,515 $2,527 $7,289 0 0
Sam B. David, Jr. 51 176 3.45 27 22 25 15.34% 42.05% $874,970 $4,971 $17,156 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
David Markgraf 7 37 5.29 6 2 6 16.22% 37.84% $83,855 $2,266 $11,979 0 0
Sam B. David, Jr. 53 187 3.53 33 36 35 17.65% 55.61% $1,004,130 $5,370 $18,946 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
David Markgraf 9 44 4.89 6 3 8 13.64% 38.64% $114,780 $2,609 $12,753 0 0
Sam B. David, Jr. 39 160 4.1 30 22 19 18.75% 44.38% $774,975 $4,844 $19,871 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
David Markgraf 16 50 3.13 2 6 3 4% 22% $58,140 $1,163 $3,634 0 0
Sam B. David, Jr. 44 174 3.95 29 26 33 16.67% 50.57% $744,545 $4,279 $16,921 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
David Markgraf 17 92 5.41 17 15 14 18.48% 50% $257,680 $2,801 $15,158 0 0
Sam B. David, Jr. 40 178 4.45 33 35 17 18.54% 47.75% $705,615 $3,964 $17,640 0 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
2025 National Trainer Avg. 4 13.53% 40.55% $5,513 $22,031
David Markgraf 14 61 4.36 8 9 8 13.11% 40.98% $96,957 $1,589 $6,926 0 0
Sam B. David, Jr. 43 194 4.51 40 35 16 20.62% 46.91% $804,590 $4,147 $18,711 0 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
2025 National Trainer Avg. 4 13.53% 40.55% $5,513 $22,031
David Markgraf 17 78 4.59 14 11 11 17.95% 46.15% $161,735 $2,074 $9,514 0 0
Sam B. David, Jr. 34 116 3.41 23 14 17 19.83% 46.55% $400,425 $3,452 $11,777 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
David Markgraf 16 81 5.06 16 11 12 19.75% 48.15% $169,100 $2,088 $10,569 0 0
Sam B. David, Jr. 14 54 3.86 9 6 5 16.67% 37.04% $138,110 $2,558 $9,865 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
David Markgraf 10 63 6.3 9 13 4 14.29% 41.27% $142,405 $2,260 $14,241 0 0
Sam B. David, Jr. 16 71 4.44 10 12 6 14.08% 39.44% $169,235 $2,384 $10,577 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
David Markgraf 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Sam B. David, Jr. 16 34 2.13 1 3 3 2.94% 20.59% $32,635 $960 $2,040 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
David Markgraf 27 154 5.7 19 21 26 12.34% 42.86% $243,879 $1,584 $9,033 0 0
Sam B. David, Jr. 1 1 1 0 0 0 0% 0% $255 $255 $255 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
David Markgraf 22 143 6.5 15 26 20 10.49% 42.66% $201,167 $1,407 $9,144 0 0
Sam B. David, Jr. 22 47 2.14 6 5 6 12.77% 36.17% $137,300 $2,921 $6,241 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
David Markgraf 36 155 4.31 15 29 18 9.68% 40% $226,528 $1,461 $6,292 0 0
Sam B. David, Jr. 43 164 3.81 17 18 16 10.37% 31.1% $323,782 $1,974 $7,530 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
David Markgraf 27 103 3.81 14 10 17 13.59% 39.81% $152,380 $1,479 $5,644 0 0
Sam B. David, Jr. 61 219 3.59 38 33 30 17.35% 46.12% $685,571 $3,130 $11,239 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
David Markgraf 26 125 4.81 21 23 18 16.8% 49.6% $285,039 $2,280 $10,963 0 0
Sam B. David, Jr. 70 217 3.1 37 34 18 17.05% 41.01% $762,521 $3,514 $10,893 0 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
2025 National Trainer Avg. 4 13.53% 40.55% $5,513 $22,031
David Markgraf 25 130 5.2 18 17 15 13.85% 38.46% $174,593 $1,343 $6,984 0 0
Sam B. David, Jr. 69 228 3.3 35 32 33 15.35% 43.86% $594,312 $2,607 $8,613 0 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
2025 National Trainer Avg. 4 13.53% 40.55% $5,513 $22,031
David Markgraf 21 81 3.86 7 7 8 8.64% 27.16% $74,732 $923 $3,559 0 0
Sam B. David, Jr. 51 214 4.2 33 37 18 15.42% 41.12% $538,746 $2,518 $10,564 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
David Markgraf 30 151 5.03 9 10 20 5.96% 25.83% $97,653 $647 $3,255 0 0
Sam B. David, Jr. 48 198 4.13 44 32 21 22.22% 48.99% $984,012 $4,970 $20,500 0 9

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
David Markgraf 28 157 5.61 19 17 27 12.1% 40.13% $145,038 $924 $5,180 0 0
Sam B. David, Jr. 65 241 3.71 35 32 41 14.52% 44.81% $633,795 $2,630 $9,751 0 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
2025 National Trainer Avg. 4 13.53% 40.55% $5,513 $22,031
David Markgraf 31 140 4.52 19 12 26 13.57% 40.71% $147,006 $1,050 $4,742 0 0
Sam B. David, Jr. 70 308 4.4 42 30 46 13.64% 38.31% $802,232 $2,605 $11,460 0 5

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
David Markgraf 29 131 4.52 20 21 19 15.27% 45.8% $171,089 $1,306 $5,900 0 0
Sam B. David, Jr. 83 342 4.12 44 45 43 12.87% 38.6% $961,037 $2,810 $11,579 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
David Markgraf 40 213 5.33 33 34 26 15.49% 43.66% $203,643 $956 $5,091 0 0
Sam B. David, Jr. 95 408 4.29 69 59 41 16.91% 41.42% $1,159,267 $2,841 $12,203 0 5

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
David Markgraf 30 184 6.13 32 24 34 17.39% 48.91% $238,430 $1,296 $7,948 0 0
Sam B. David, Jr. 86 378 4.4 76 47 45 20.11% 44.44% $1,298,531 $3,435 $15,099 0 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
2025 National Trainer Avg. 4 13.53% 40.55% $5,513 $22,031
David Markgraf 24 121 5.04 22 15 23 18.18% 49.59% $186,828 $1,544 $7,785 0 0
Sam B. David, Jr. 88 399 4.53 59 59 60 14.79% 44.61% $1,217,865 $3,052 $13,839 1 5

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
David Markgraf 21 142 6.76 17 18 23 11.97% 40.85% $131,273 $924 $6,251 0 0
Sam B. David, Jr. 60 321 5.35 63 37 40 19.63% 43.61% $1,613,795 $5,027 $26,897 5 9

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
David Markgraf 27 179 6.63 31 31 32 17.32% 52.51% $218,428 $1,220 $8,090 0 0
Sam B. David, Jr. 48 194 4.04 28 26 22 14.43% 39.18% $366,310 $1,888 $7,631 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
David Markgraf 20 108 5.4 28 21 9 25.93% 53.7% $152,872 $1,415 $7,644 0 0
Sam B. David, Jr. 46 264 5.74 46 35 32 17.42% 42.8% $414,955 $1,572 $9,021 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
David Markgraf 24 158 6.58 19 22 29 12.03% 44.3% $120,483 $763 $5,020 0 0
Sam B. David, Jr. 40 220 5.5 34 24 32 15.45% 40.91% $353,456 $1,607 $8,836 0 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
2025 National Trainer Avg. 4 13.53% 40.55% $5,513 $22,031
David Markgraf 20 143 7.15 26 19 24 18.18% 48.25% $100,556 $703 $5,028 0 0
Sam B. David, Jr. 46 256 5.57 28 27 33 10.94% 34.38% $265,537 $1,037 $5,773 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
David Markgraf 22 150 6.82 29 19 22 19.33% 46.67% $168,430 $1,123 $7,656 0 0
Sam B. David, Jr. 37 220 5.95 43 30 38 19.55% 50.45% $326,342 $1,483 $8,820 0 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
2025 National Trainer Avg. 4 13.53% 40.55% $5,513 $22,031
David Markgraf 33 170 5.15 22 27 17 12.94% 38.82% $131,281 $772 $3,978 0 0
Sam B. David, Jr. 45 288 6.4 37 30 31 12.85% 34.03% $284,905 $989 $6,331 0 0