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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
Martin L. Rouck 1 4 4 0 0 2 0% 50% $11,653 $2,913 $11,653 0 0
Robertino Diodoro 117 273 2.33 84 40 38 30.77% 59.34% $1,676,477 $6,141 $14,329 1 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
Martin L. Rouck 3 9 3 1 0 1 11.11% 22.22% $18,508 $2,056 $6,169 0 0
Robertino Diodoro 192 561 2.92 128 107 74 22.82% 55.08% $4,128,650 $7,359 $21,503 2 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
Martin L. Rouck 4 11 2.75 3 2 0 27.27% 45.45% $40,527 $3,684 $10,132 0 0
Robertino Diodoro 179 438 2.45 110 67 57 25.11% 53.42% $3,730,708 $8,518 $20,842 1 7

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
Martin L. Rouck 4 11 2.75 3 3 1 27.27% 63.64% $66,466 $6,042 $16,617 0 0
Robertino Diodoro 304 785 2.58 150 141 107 19.11% 50.7% $5,867,506 $7,475 $19,301 1 6

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
Martin L. Rouck 1 7 7 0 1 2 0% 42.86% $16,320 $2,331 $16,320 0 0
Robertino Diodoro 339 894 2.64 191 152 104 21.36% 50% $6,800,660 $7,607 $20,061 1 11

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
Martin L. Rouck 4 4 1 0 0 0 0% 0% $2,733 $683 $683 0 0
Robertino Diodoro 292 904 3.1 223 178 108 24.67% 56.31% $7,496,024 $8,292 $25,671 3 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
Martin L. Rouck 4 18 4.5 1 2 0 5.56% 16.67% $29,083 $1,616 $7,271 0 0
Robertino Diodoro 311 1110 3.57 242 188 152 21.8% 52.43% $6,011,283 $5,416 $19,329 1 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
Martin L. Rouck 5 13 2.6 2 1 0 15.38% 23.08% $40,338 $3,103 $8,068 0 0
Robertino Diodoro 310 1043 3.36 257 182 183 24.64% 59.64% $5,763,032 $5,525 $18,590 0 7

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
Martin L. Rouck 7 20 2.86 1 8 1 5% 50% $57,569 $2,878 $8,224 0 0
Robertino Diodoro 321 1056 3.29 255 180 150 24.15% 55.4% $6,078,667 $5,756 $18,937 2 7

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
Martin L. Rouck 5 14 2.8 1 2 1 7.14% 28.57% $42,853 $3,061 $8,571 0 0
Robertino Diodoro 306 970 3.17 219 163 126 22.58% 52.37% $5,162,000 $5,322 $16,869 2 7

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
Martin L. Rouck 10 37 3.7 7 8 4 18.92% 51.35% $117,988 $3,189 $11,799 0 0
Robertino Diodoro 258 933 3.62 242 168 115 25.94% 56.27% $4,642,888 $4,976 $17,996 1 7

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
Martin L. Rouck 10 49 4.9 5 0 5 10.2% 20.41% $62,259 $1,271 $6,226 0 0
Robertino Diodoro 241 813 3.37 190 141 95 23.37% 52.4% $3,198,906 $3,935 $13,273 0 7

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
Martin L. Rouck 11 38 3.45 4 6 6 10.53% 42.11% $93,135 $2,451 $8,467 0 0
Robertino Diodoro 276 920 3.33 243 149 137 26.41% 57.5% $3,780,862 $4,110 $13,699 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
Martin L. Rouck 10 54 5.4 6 6 9 11.11% 38.89% $125,726 $2,328 $12,573 0 0
Robertino Diodoro 175 653 3.73 149 132 87 22.82% 56.36% $2,356,297 $3,608 $13,465 2 8

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
Martin L. Rouck 13 75 5.77 7 13 8 9.33% 37.33% $136,699 $1,823 $10,515 0 0
Robertino Diodoro 168 619 3.68 106 86 85 17.12% 44.75% $1,542,746 $2,492 $9,183 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
Martin L. Rouck 10 51 5.1 8 7 6 15.69% 41.18% $123,753 $2,427 $12,375 0 1
Robertino Diodoro 166 667 4.02 137 117 99 20.54% 52.92% $1,748,505 $2,621 $10,533 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
Martin L. Rouck 14 59 4.21 3 9 5 5.08% 28.81% $68,428 $1,160 $4,888 0 0
Robertino Diodoro 152 533 3.51 109 71 79 20.45% 48.59% $1,200,249 $2,252 $7,896 0 7

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
Martin L. Rouck 10 57 5.7 13 6 4 22.81% 40.35% $128,781 $2,259 $12,878 0 0
Robertino Diodoro 115 401 3.49 61 50 58 15.21% 42.14% $650,377 $1,622 $5,655 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
Martin L. Rouck 10 70 7 12 8 7 17.14% 38.57% $100,339 $1,433 $10,034 0 0
Robertino Diodoro 98 389 3.97 64 49 41 16.45% 39.59% $653,231 $1,679 $6,666 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
Martin L. Rouck 15 57 3.8 8 8 5 14.04% 36.84% $79,533 $1,395 $5,302 0 0
Robertino Diodoro 89 346 3.89 55 60 41 15.9% 45.09% $708,077 $2,046 $7,956 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
Martin L. Rouck 15 66 4.4 11 11 7 16.67% 43.94% $190,825 $2,891 $12,722 0 0
Robertino Diodoro 67 253 3.78 27 30 21 10.67% 30.83% $307,573 $1,216 $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
Martin L. Rouck 12 43 3.58 4 9 5 9.3% 41.86% $161,920 $3,766 $13,493 0 1
Robertino Diodoro 53 235 4.43 29 38 20 12.34% 37.02% $288,205 $1,226 $5,438 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
Martin L. Rouck 9 45 5 9 5 3 20% 37.78% $161,118 $3,580 $17,902 0 2
Robertino Diodoro 47 223 4.74 31 28 19 13.9% 34.98% $355,973 $1,596 $7,574 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
Martin L. Rouck 10 43 4.3 4 5 2 9.3% 25.58% $84,057 $1,955 $8,406 0 0
Robertino Diodoro 66 301 4.56 30 45 39 9.97% 37.87% $382,529 $1,271 $5,796 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
Martin L. Rouck 8 51 6.38 17 9 6 33.33% 62.75% $271,861 $5,331 $33,983 0 2
Robertino Diodoro 52 244 4.69 29 42 34 11.89% 43.03% $335,720 $1,376 $6,456 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
Martin L. Rouck 8 36 4.5 6 6 5 16.67% 47.22% $98,748 $2,743 $12,344 0 0
Robertino Diodoro 44 227 5.16 33 25 21 14.54% 34.8% $248,130 $1,093 $5,639 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
Martin L. Rouck 7 39 5.57 5 7 2 12.82% 35.9% $113,444 $2,909 $16,206 0 0
Robertino Diodoro 38 182 4.79 28 25 23 15.38% 41.76% $149,680 $822 $3,939 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
Martin L. Rouck 9 42 4.67 8 6 3 19.05% 40.48% $88,995 $2,119 $9,888 0 0
Robertino Diodoro 27 149 5.52 14 21 14 9.4% 32.89% $75,393 $506 $2,792 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
Martin L. Rouck 10 35 3.5 1 5 4 2.86% 28.57% $55,947 $1,598 $5,595 0 0
Robertino Diodoro 35 161 4.6 13 20 22 8.07% 34.16% $91,277 $567 $2,608 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
Martin L. Rouck 8 34 4.25 3 4 3 8.82% 29.41% $41,339 $1,216 $5,167 0 0
Robertino Diodoro 18 76 4.22 9 8 9 11.84% 34.21% $47,126 $620 $2,618 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
Martin L. Rouck 5 26 5.2 4 3 9 15.38% 61.54% $58,907 $2,266 $11,781 0 0
Robertino Diodoro 9 43 4.78 5 7 4 11.63% 37.21% $27,627 $642 $3,070 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
Martin L. Rouck 6 34 5.67 3 4 4 8.82% 32.35% $34,676 $1,020 $5,779 0 0
Robertino Diodoro 4 17 4.25 3 3 3 17.65% 52.94% $14,304 $841 $3,576 0 0