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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
Mark E. Thomas 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Don Roberson 2 9 4.5 0 0 1 0% 11.11% $6,007 $667 $3,004 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
Mark E. Thomas 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Don Roberson 2 12 6 0 2 4 0% 50% $18,184 $1,515 $9,092 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
Mark E. Thomas 7 30 4.29 4 5 6 13.33% 50% $68,702 $2,290 $9,815 0 0
Don Roberson 3 24 8 2 3 2 8.33% 29.17% $33,929 $1,414 $11,310 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
Mark E. Thomas 10 39 3.9 7 7 7 17.95% 53.85% $119,550 $3,065 $11,955 0 0
Don Roberson 3 8 2.67 1 1 4 12.5% 75% $23,776 $2,972 $7,925 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
Mark E. Thomas 12 41 3.42 2 4 9 4.88% 36.59% $52,303 $1,276 $4,359 0 0
Don Roberson 7 28 4 3 3 5 10.71% 39.29% $49,785 $1,778 $7,112 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
Mark E. Thomas 12 51 4.25 9 8 7 17.65% 47.06% $133,723 $2,622 $11,144 0 0
Don Roberson 13 41 3.15 5 1 4 12.2% 24.39% $83,681 $2,041 $6,437 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
Mark E. Thomas 14 65 4.64 10 10 8 15.38% 43.08% $126,136 $1,941 $9,010 0 0
Don Roberson 19 105 5.53 10 13 9 9.52% 30.48% $249,913 $2,380 $13,153 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
Mark E. Thomas 15 63 4.2 7 11 14 11.11% 50.79% $122,995 $1,952 $8,200 0 0
Don Roberson 17 47 2.76 5 3 5 10.64% 27.66% $95,986 $2,042 $5,646 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
Mark E. Thomas 16 71 4.44 9 6 12 12.68% 38.03% $139,148 $1,960 $8,697 0 0
Don Roberson 7 7 1 0 0 0 0% 0% $3,080 $440 $440 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
Mark E. Thomas 14 40 2.86 3 3 5 7.5% 27.5% $48,106 $1,203 $3,436 0 0
Don Roberson 24 94 3.92 8 9 10 8.51% 28.72% $181,686 $1,933 $7,570 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
Mark E. Thomas 11 37 3.36 4 7 4 10.81% 40.54% $128,963 $3,485 $11,724 0 0
Don Roberson 35 135 3.86 15 20 14 11.11% 36.3% $123,696 $916 $3,534 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
Mark E. Thomas 14 43 3.07 5 5 6 11.63% 37.21% $119,061 $2,769 $8,504 0 1
Don Roberson 55 220 4 26 34 20 11.82% 36.36% $558,415 $2,538 $10,153 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
Mark E. Thomas 12 32 2.67 1 2 6 3.13% 28.13% $28,655 $895 $2,388 0 0
Don Roberson 48 186 3.88 30 31 20 16.13% 43.55% $413,662 $2,224 $8,618 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
Mark E. Thomas 15 59 3.93 4 5 4 6.78% 22.03% $55,020 $933 $3,668 0 0
Don Roberson 37 166 4.49 12 16 16 7.23% 26.51% $141,755 $854 $3,831 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
Mark E. Thomas 8 43 5.38 5 4 4 11.63% 30.23% $79,070 $1,839 $9,884 0 0
Don Roberson 36 156 4.33 16 17 18 10.26% 32.69% $237,629 $1,523 $6,601 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
Mark E. Thomas 13 49 3.77 2 2 6 4.08% 20.41% $55,104 $1,125 $4,239 0 0
Don Roberson 20 72 3.6 21 7 3 29.17% 43.06% $333,206 $4,628 $16,660 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
Mark E. Thomas 13 56 4.31 5 2 4 8.93% 19.64% $58,559 $1,046 $4,505 0 0
Don Roberson 39 189 4.85 32 24 15 16.93% 37.57% $433,718 $2,295 $11,121 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
Mark E. Thomas 11 59 5.36 7 7 13 11.86% 45.76% $115,477 $1,957 $10,498 0 0
Don Roberson 66 248 3.76 43 41 35 17.34% 47.98% $650,461 $2,623 $9,855 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
Mark E. Thomas 20 121 6.05 15 13 26 12.4% 44.63% $137,271 $1,134 $6,864 0 0
Don Roberson 75 309 4.12 42 36 44 13.59% 39.48% $570,702 $1,847 $7,609 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
Mark E. Thomas 21 108 5.14 12 16 18 11.11% 42.59% $136,905 $1,268 $6,519 0 0
Don Roberson 67 362 5.4 49 61 42 13.54% 41.99% $718,510 $1,985 $10,724 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
Mark E. Thomas 25 106 4.24 9 16 16 8.49% 38.68% $120,195 $1,134 $4,808 0 0
Don Roberson 109 478 4.39 68 65 37 14.23% 35.56% $999,719 $2,091 $9,172 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
Mark E. Thomas 21 114 5.43 13 19 14 11.4% 40.35% $124,092 $1,089 $5,909 0 0
Don Roberson 111 433 3.9 77 75 40 17.78% 44.34% $1,221,075 $2,820 $11,001 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
Mark E. Thomas 25 137 5.48 13 22 27 9.49% 45.26% $188,598 $1,377 $7,544 0 0
Don Roberson 77 342 4.44 43 48 44 12.57% 39.47% $789,112 $2,307 $10,248 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
Mark E. Thomas 21 113 5.38 20 18 19 17.7% 50.44% $216,670 $1,917 $10,318 0 0
Don Roberson 106 451 4.25 54 60 67 11.97% 40.13% $796,550 $1,766 $7,515 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
Mark E. Thomas 14 83 5.93 12 12 17 14.46% 49.4% $125,589 $1,513 $8,971 0 1
Don Roberson 43 199 4.63 27 25 21 13.57% 36.68% $276,218 $1,388 $6,424 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
Mark E. Thomas 16 97 6.06 10 11 13 10.31% 35.05% $75,640 $780 $4,728 0 0
Don Roberson 54 217 4.02 34 32 31 15.67% 44.7% $454,590 $2,095 $8,418 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
Mark E. Thomas 15 67 4.47 5 11 6 7.46% 32.84% $35,681 $533 $2,379 0 0
Don Roberson 69 256 3.71 28 30 47 10.94% 41.02% $192,121 $750 $2,784 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
Mark E. Thomas 9 39 4.33 5 4 7 12.82% 41.03% $23,391 $600 $2,599 0 0
Don Roberson 32 164 5.13 35 29 17 21.34% 49.39% $265,006 $1,616 $8,281 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
Mark E. Thomas 2 10 5 2 2 2 20% 60% $12,597 $1,260 $6,299 0 0
Don Roberson 50 256 5.12 36 37 37 14.06% 42.97% $158,679 $620 $3,174 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
Mark E. Thomas 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Don Roberson 33 197 5.97 39 28 32 19.8% 50.25% $130,822 $664 $3,964 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
Mark E. Thomas 11 46 4.18 0 3 2 0% 10.87% $4,872 $106 $443 0 0
Don Roberson 15 110 7.33 16 17 18 14.55% 46.36% $65,310 $594 $4,354 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
Mark E. Thomas 3 5 1.67 0 0 0 0% 0% $512 $102 $171 0 0
Don Roberson 25 166 6.64 25 21 17 15.06% 37.95% $67,081 $404 $2,683 0 0