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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 $22,028
Donnie K. Von Hemel 31 110 3.55 10 13 15 9.09% 34.55% $706,216 $6,420 $22,781 0 0
Joan Petrowski 21 115 5.48 9 21 16 7.83% 40% $166,562 $1,448 $7,932 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 $22,028
Donnie K. Von Hemel 32 130 4.06 9 21 15 6.92% 34.62% $1,168,936 $8,992 $36,529 0 0
Joan Petrowski 10 61 6.1 8 10 10 13.11% 45.9% $97,693 $1,602 $9,769 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 $22,028
Donnie K. Von Hemel 39 122 3.13 17 22 21 13.93% 49.18% $1,019,281 $8,355 $26,135 0 0
Joan Petrowski 20 85 4.25 3 6 10 3.53% 22.35% $41,634 $490 $2,082 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 $22,028
Donnie K. Von Hemel 36 100 2.78 10 13 9 10% 32% $821,520 $8,215 $22,820 0 2
Joan Petrowski 28 157 5.61 11 13 17 7.01% 26.11% $100,532 $640 $3,590 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 $22,028
Donnie K. Von Hemel 46 169 3.67 11 27 18 6.51% 33.14% $717,511 $4,246 $15,598 0 1
Joan Petrowski 28 160 5.71 23 15 19 14.38% 35.63% $154,285 $964 $5,510 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 $22,028
Donnie K. Von Hemel 63 216 3.43 28 24 30 12.96% 37.96% $1,008,185 $4,668 $16,003 0 2
Joan Petrowski 33 137 4.15 4 12 9 2.92% 18.25% $63,214 $461 $1,916 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 $22,028
Donnie K. Von Hemel 53 191 3.6 26 24 29 13.61% 41.36% $1,075,015 $5,628 $20,283 0 0
Joan Petrowski 40 198 4.95 20 16 24 10.1% 30.3% $177,254 $895 $4,431 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 $22,028
Donnie K. Von Hemel 57 221 3.88 21 33 36 9.5% 40.72% $1,496,305 $6,771 $26,251 1 4
Joan Petrowski 38 205 5.39 13 20 28 6.34% 29.76% $205,425 $1,002 $5,406 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 $22,028
Donnie K. Von Hemel 75 243 3.24 30 36 20 12.35% 35.39% $1,413,268 $5,816 $18,844 0 3
Joan Petrowski 58 306 5.28 20 33 30 6.54% 27.12% $304,412 $995 $5,248 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 $22,028
Donnie K. Von Hemel 90 340 3.78 46 51 50 13.53% 43.24% $2,619,431 $7,704 $29,105 1 4
Joan Petrowski 50 279 5.58 25 27 39 8.96% 32.62% $287,844 $1,032 $5,757 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 $22,028
Donnie K. Von Hemel 79 354 4.48 50 54 56 14.12% 45.2% $2,659,239 $7,512 $33,661 1 8
Joan Petrowski 64 344 5.38 27 39 36 7.85% 29.65% $359,983 $1,046 $5,625 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 $22,028
Donnie K. Von Hemel 73 280 3.84 39 38 39 13.93% 41.43% $1,550,789 $5,539 $21,244 0 5
Joan Petrowski 66 380 5.76 36 47 46 9.47% 33.95% $497,648 $1,310 $7,540 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 $22,028
Donnie K. Von Hemel 83 367 4.42 60 62 42 16.35% 44.69% $2,428,288 $6,617 $29,256 0 4
Joan Petrowski 60 297 4.95 29 37 50 9.76% 39.06% $367,932 $1,239 $6,132 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 $22,028
Donnie K. Von Hemel 80 307 3.84 53 41 38 17.26% 43% $2,802,315 $9,128 $35,029 4 15
Joan Petrowski 59 341 5.78 34 40 42 9.97% 34.02% $744,267 $2,183 $12,615 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 $22,028
Donnie K. Von Hemel 86 312 3.63 53 42 38 16.99% 42.63% $2,820,675 $9,041 $32,799 5 10
Joan Petrowski 55 328 5.96 48 45 34 14.63% 38.72% $729,707 $2,225 $13,267 0 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 $22,028
Donnie K. Von Hemel 92 341 3.71 57 43 46 16.72% 42.82% $1,653,766 $4,850 $17,976 0 2
Joan Petrowski 56 294 5.25 23 34 49 7.82% 36.05% $420,778 $1,431 $7,514 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 $22,028
Donnie K. Von Hemel 86 379 4.41 55 57 61 14.51% 45.65% $2,144,361 $5,658 $24,934 2 8
Joan Petrowski 62 308 4.97 36 40 30 11.69% 34.42% $426,913 $1,386 $6,886 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 $22,028
Donnie K. Von Hemel 88 393 4.47 69 70 57 17.56% 49.87% $2,333,227 $5,937 $26,514 1 10
Joan Petrowski 54 283 5.24 26 29 39 9.19% 33.22% $427,958 $1,512 $7,925 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 $22,028
Donnie K. Von Hemel 97 429 4.42 70 62 82 16.32% 49.88% $2,789,448 $6,502 $28,757 1 13
Joan Petrowski 48 247 5.15 23 35 26 9.31% 34.01% $593,958 $2,405 $12,374 1 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 $22,028
Donnie K. Von Hemel 95 422 4.44 76 68 73 18.01% 51.42% $2,340,561 $5,546 $24,637 0 15
Joan Petrowski 43 240 5.58 24 22 24 10% 29.17% $288,191 $1,201 $6,702 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 $22,028
Donnie K. Von Hemel 94 408 4.34 68 69 65 16.67% 49.51% $1,816,265 $4,452 $19,322 0 11
Joan Petrowski 58 288 4.97 16 18 27 5.56% 21.18% $176,550 $613 $3,044 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 $22,028
Donnie K. Von Hemel 118 479 4.06 91 84 77 19% 52.61% $2,285,398 $4,771 $19,368 2 11
Joan Petrowski 53 346 6.53 46 41 39 13.29% 36.42% $721,237 $2,085 $13,608 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 $22,028
Donnie K. Von Hemel 95 416 4.38 94 81 59 22.6% 56.25% $2,576,588 $6,194 $27,122 2 13
Joan Petrowski 46 314 6.83 37 44 39 11.78% 38.22% $484,681 $1,544 $10,537 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 $22,028
Donnie K. Von Hemel 77 339 4.4 91 42 45 26.84% 52.51% $2,245,045 $6,623 $29,156 5 19
Joan Petrowski 44 280 6.36 34 30 35 12.14% 35.36% $425,455 $1,519 $9,669 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 $22,028
Donnie K. Von Hemel 66 302 4.58 69 47 41 22.85% 51.99% $1,876,880 $6,215 $28,438 2 13
Joan Petrowski 36 216 6 18 21 34 8.33% 33.8% $226,608 $1,049 $6,295 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 $22,028
Donnie K. Von Hemel 77 312 4.05 53 47 43 16.99% 45.83% $1,333,826 $4,275 $17,322 1 11
Joan Petrowski 41 262 6.39 19 22 29 7.25% 26.72% $128,299 $490 $3,129 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 $22,028
Donnie K. Von Hemel 86 342 3.98 81 52 45 23.68% 52.05% $1,856,653 $5,429 $21,589 0 11
Joan Petrowski 55 326 5.93 35 34 41 10.74% 33.74% $261,710 $803 $4,758 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 $22,028
Donnie K. Von Hemel 78 286 3.67 65 47 42 22.73% 53.85% $1,784,609 $6,240 $22,880 0 12
Joan Petrowski 51 353 6.92 43 38 38 12.18% 33.71% $313,526 $888 $6,148 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 $22,028
Donnie K. Von Hemel 78 336 4.31 61 55 58 18.15% 51.79% $1,345,451 $4,004 $17,249 0 9
Joan Petrowski 41 273 6.66 29 24 36 10.62% 32.6% $193,371 $708 $4,716 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 $22,028
Donnie K. Von Hemel 94 341 3.63 70 69 40 20.53% 52.49% $1,108,116 $3,250 $11,788 1 8
Joan Petrowski 41 281 6.85 33 34 37 11.74% 37.01% $238,831 $850 $5,825 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 $22,028
Donnie K. Von Hemel 91 404 4.44 83 62 74 20.54% 54.21% $1,647,073 $4,077 $18,100 2 14
Joan Petrowski 43 321 7.47 29 39 39 9.03% 33.33% $143,326 $446 $3,333 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 $22,028
Donnie K. Von Hemel 97 405 4.18 105 70 67 25.93% 59.75% $1,884,837 $4,654 $19,431 4 16
Joan Petrowski 50 345 6.9 49 40 45 14.2% 38.84% $199,313 $578 $3,986 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 $22,028
Donnie K. Von Hemel 86 410 4.77 76 64 60 18.54% 48.78% $1,115,026 $2,720 $12,965 1 10
Joan Petrowski 46 338 7.35 37 43 39 10.95% 35.21% $158,283 $468 $3,441 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 $22,028
Donnie K. Von Hemel 89 404 4.54 94 70 45 23.27% 51.73% $1,406,981 $3,483 $15,809 1 15
Joan Petrowski 45 364 8.09 34 42 66 9.34% 39.01% $184,058 $506 $4,090 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 $22,028
Donnie K. Von Hemel 83 401 4.83 72 66 47 17.96% 46.13% $1,269,417 $3,166 $15,294 1 6
Joan Petrowski 47 414 8.81 44 55 67 10.63% 40.1% $221,526 $535 $4,713 0 0