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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
Joan Petrowski 14 24 1.71 1 4 7 4.17% 50% $25,639 $1,068 $1,831 0 0
Mike Chambers 12 29 2.42 5 9 4 17.24% 62.07% $70,830 $2,442 $5,903 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
Joan Petrowski 21 115 5.48 9 21 16 7.83% 40% $166,562 $1,448 $7,932 0 0
Mike Chambers 9 23 2.56 6 1 3 26.09% 43.48% $48,924 $2,127 $5,436 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
Joan Petrowski 10 61 6.1 8 10 10 13.11% 45.9% $97,693 $1,602 $9,769 0 0
Mike Chambers 18 34 1.89 2 7 8 5.88% 50% $65,543 $1,928 $3,641 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
Joan Petrowski 20 85 4.25 3 6 10 3.53% 22.35% $41,634 $490 $2,082 0 0
Mike Chambers 12 31 2.58 5 9 4 16.13% 58.06% $95,878 $3,093 $7,990 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
Joan Petrowski 28 157 5.61 11 13 17 7.01% 26.11% $100,532 $640 $3,590 0 0
Mike Chambers 19 46 2.42 11 9 1 23.91% 45.65% $147,286 $3,202 $7,752 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
Joan Petrowski 28 160 5.71 23 15 19 14.38% 35.63% $154,285 $964 $5,510 0 0
Mike Chambers 19 56 2.95 10 9 6 17.86% 44.64% $84,707 $1,513 $4,458 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
Joan Petrowski 33 137 4.15 4 12 9 2.92% 18.25% $63,214 $461 $1,916 0 0
Mike Chambers 11 21 1.91 0 2 4 0% 28.57% $10,038 $478 $913 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
Joan Petrowski 40 198 4.95 20 16 24 10.1% 30.3% $177,254 $895 $4,431 0 0
Mike Chambers 15 35 2.33 6 5 7 17.14% 51.43% $49,450 $1,413 $3,297 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
Joan Petrowski 38 205 5.39 13 20 28 6.34% 29.76% $205,425 $1,002 $5,406 0 0
Mike Chambers 20 36 1.8 8 4 4 22.22% 44.44% $71,823 $1,995 $3,591 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
Joan Petrowski 58 306 5.28 20 33 30 6.54% 27.12% $304,412 $995 $5,248 0 0
Mike Chambers 22 44 2 8 3 7 18.18% 40.91% $94,610 $2,150 $4,300 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
Joan Petrowski 50 279 5.58 25 27 39 8.96% 32.62% $287,844 $1,032 $5,757 0 0
Mike Chambers 19 51 2.68 14 5 8 27.45% 52.94% $102,427 $2,008 $5,391 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
Joan Petrowski 64 344 5.38 27 39 36 7.85% 29.65% $359,983 $1,046 $5,625 0 0
Mike Chambers 45 130 2.89 38 23 24 29.23% 65.38% $317,852 $2,445 $7,063 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
Joan Petrowski 66 380 5.76 36 47 46 9.47% 33.95% $497,648 $1,310 $7,540 0 0
Mike Chambers 51 195 3.82 48 36 31 24.62% 58.97% $464,949 $2,384 $9,117 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
Joan Petrowski 60 297 4.95 29 37 50 9.76% 39.06% $367,932 $1,239 $6,132 0 0
Mike Chambers 62 209 3.37 71 30 31 33.97% 63.16% $637,207 $3,049 $10,278 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
Joan Petrowski 59 341 5.78 34 40 42 9.97% 34.02% $744,267 $2,183 $12,615 1 5
Mike Chambers 72 212 2.94 62 47 39 29.25% 69.81% $603,376 $2,846 $8,380 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
Joan Petrowski 55 328 5.96 48 45 34 14.63% 38.72% $729,707 $2,225 $13,267 0 6
Mike Chambers 95 259 2.73 78 46 39 30.12% 62.93% $547,617 $2,114 $5,764 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
Joan Petrowski 56 294 5.25 23 34 49 7.82% 36.05% $420,778 $1,431 $7,514 0 1
Mike Chambers 77 232 3.01 79 61 29 34.05% 72.84% $626,917 $2,702 $8,142 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
Joan Petrowski 62 308 4.97 36 40 30 11.69% 34.42% $426,913 $1,386 $6,886 0 1
Mike Chambers 87 273 3.14 95 50 34 34.8% 65.57% $670,085 $2,455 $7,702 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 $22,031
Joan Petrowski 54 283 5.24 26 29 39 9.19% 33.22% $427,958 $1,512 $7,925 0 2
Mike Chambers 110 333 3.03 126 63 48 37.84% 71.17% $1,127,188 $3,385 $10,247 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
Joan Petrowski 48 247 5.15 23 35 26 9.31% 34.01% $593,958 $2,405 $12,374 1 3
Mike Chambers 57 171 3 51 46 18 29.82% 67.25% $498,813 $2,917 $8,751 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
Joan Petrowski 43 240 5.58 24 22 24 10% 29.17% $288,191 $1,201 $6,702 0 1
Mike Chambers 21 38 1.81 14 7 10 36.84% 81.58% $103,288 $2,718 $4,918 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
Joan Petrowski 58 288 4.97 16 18 27 5.56% 21.18% $176,550 $613 $3,044 0 0
Mike Chambers 2 5 2.5 2 2 1 40% 100% $11,370 $2,274 $5,685 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
Joan Petrowski 36 216 6 18 21 34 8.33% 33.8% $226,608 $1,049 $6,295 0 0
Mike Chambers 10 22 2.2 3 5 3 13.64% 50% $21,786 $990 $2,179 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
Joan Petrowski 41 262 6.39 19 22 29 7.25% 26.72% $128,299 $490 $3,129 0 0
Mike Chambers 5 12 2.4 3 0 2 25% 41.67% $27,165 $2,264 $5,433 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
Joan Petrowski 55 326 5.93 35 34 41 10.74% 33.74% $261,710 $803 $4,758 0 0
Mike Chambers 25 73 2.92 6 12 7 8.22% 34.25% $215,780 $2,956 $8,631 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
Joan Petrowski 51 353 6.92 43 38 38 12.18% 33.71% $313,526 $888 $6,148 0 1
Mike Chambers 27 83 3.07 10 12 14 12.05% 43.37% $312,059 $3,760 $11,558 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
Joan Petrowski 41 273 6.66 29 24 36 10.62% 32.6% $193,371 $708 $4,716 0 0
Mike Chambers 37 137 3.7 21 31 23 15.33% 54.74% $1,014,315 $7,404 $27,414 1 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
Joan Petrowski 41 281 6.85 33 34 37 11.74% 37.01% $238,831 $850 $5,825 0 2
Mike Chambers 33 99 3 14 18 15 14.14% 47.47% $595,068 $6,011 $18,032 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 $22,031
Joan Petrowski 43 321 7.47 29 39 39 9.03% 33.33% $143,326 $446 $3,333 0 0
Mike Chambers 25 104 4.16 17 7 20 16.35% 42.31% $458,767 $4,411 $18,351 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
Joan Petrowski 50 345 6.9 49 40 45 14.2% 38.84% $199,313 $578 $3,986 0 0
Mike Chambers 29 112 3.86 18 21 11 16.07% 44.64% $440,497 $3,933 $15,190 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
Joan Petrowski 46 338 7.35 37 43 39 10.95% 35.21% $158,283 $468 $3,441 0 0
Mike Chambers 59 278 4.71 58 43 33 20.86% 48.2% $507,310 $1,825 $8,598 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
Joan Petrowski 45 364 8.09 34 42 66 9.34% 39.01% $184,058 $506 $4,090 0 0
Mike Chambers 77 358 4.65 66 59 58 18.44% 51.12% $607,945 $1,698 $7,895 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
Joan Petrowski 47 414 8.81 44 55 67 10.63% 40.1% $221,526 $535 $4,713 0 0
Mike Chambers 75 374 4.99 86 52 56 22.99% 51.87% $772,203 $2,065 $10,296 0 4