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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
Mike Chambers 9 23 2.56 6 1 3 26.09% 43.48% $48,924 $2,127 $5,436 0 0
Renee D. Kierans 2 21 10.5 2 3 3 9.52% 38.1% $78,506 $3,738 $39,253 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
Mike Chambers 18 34 1.89 2 7 8 5.88% 50% $65,543 $1,928 $3,641 0 0
Renee D. Kierans 5 35 7 3 2 6 8.57% 31.43% $89,700 $2,563 $17,940 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
Mike Chambers 12 31 2.58 5 9 4 16.13% 58.06% $95,878 $3,093 $7,990 0 0
Renee D. Kierans 3 26 8.67 4 1 3 15.38% 30.77% $83,304 $3,204 $27,768 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
Mike Chambers 19 46 2.42 11 9 1 23.91% 45.65% $147,286 $3,202 $7,752 0 0
Renee D. Kierans 3 28 9.33 2 2 2 7.14% 21.43% $77,138 $2,755 $25,713 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
Mike Chambers 19 56 2.95 10 9 6 17.86% 44.64% $84,707 $1,513 $4,458 0 0
Renee D. Kierans 5 27 5.4 1 3 4 3.7% 29.63% $46,158 $1,710 $9,232 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
Mike Chambers 11 21 1.91 0 2 4 0% 28.57% $10,038 $478 $913 0 0
Renee D. Kierans 6 33 5.5 3 1 5 9.09% 27.27% $137,736 $4,174 $22,956 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
Mike Chambers 15 35 2.33 6 5 7 17.14% 51.43% $49,450 $1,413 $3,297 0 0
Renee D. Kierans 6 47 7.83 8 5 5 17.02% 38.3% $179,436 $3,818 $29,906 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
Mike Chambers 20 36 1.8 8 4 4 22.22% 44.44% $71,823 $1,995 $3,591 0 0
Renee D. Kierans 6 31 5.17 3 5 7 9.68% 48.39% $100,304 $3,236 $16,717 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
Mike Chambers 22 44 2 8 3 7 18.18% 40.91% $94,610 $2,150 $4,300 0 0
Renee D. Kierans 3 17 5.67 0 4 4 0% 47.06% $32,947 $1,938 $10,982 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
Mike Chambers 19 51 2.68 14 5 8 27.45% 52.94% $102,427 $2,008 $5,391 0 0
Renee D. Kierans 2 9 4.5 2 0 1 22.22% 33.33% $22,145 $2,461 $11,073 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
Mike Chambers 45 130 2.89 38 23 24 29.23% 65.38% $317,852 $2,445 $7,063 0 0
Renee D. Kierans 4 25 6.25 0 2 3 0% 20% $27,141 $1,086 $6,785 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
Mike Chambers 51 195 3.82 48 36 31 24.62% 58.97% $464,949 $2,384 $9,117 0 0
Renee D. Kierans 3 15 5 0 1 1 0% 13.33% $9,921 $661 $3,307 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
Mike Chambers 62 209 3.37 71 30 31 33.97% 63.16% $637,207 $3,049 $10,278 0 1
Renee D. Kierans 2 20 10 2 3 7 10% 60% $55,585 $2,779 $27,793 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
Mike Chambers 72 212 2.94 62 47 39 29.25% 69.81% $603,376 $2,846 $8,380 0 1
Renee D. Kierans 2 7 3.5 0 0 3 0% 42.86% $10,008 $1,430 $5,004 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 $22,028
Mike Chambers 95 259 2.73 78 46 39 30.12% 62.93% $547,617 $2,114 $5,764 0 0
Renee D. Kierans 2 4 2 1 0 0 25% 25% $11,851 $2,963 $5,926 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
Mike Chambers 77 232 3.01 79 61 29 34.05% 72.84% $626,917 $2,702 $8,142 0 0
Renee D. Kierans 2 4 2 0 0 0 0% 0% $2,979 $745 $1,490 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
Mike Chambers 87 273 3.14 95 50 34 34.8% 65.57% $670,085 $2,455 $7,702 0 1
Renee D. Kierans 1 2 2 0 1 0 0% 50% $14,592 $7,296 $14,592 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
Mike Chambers 110 333 3.03 126 63 48 37.84% 71.17% $1,127,188 $3,385 $10,247 0 5
Renee D. Kierans 1 2 2 0 1 0 0% 50% $10,391 $5,196 $10,391 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 $22,028
Mike Chambers 57 171 3 51 46 18 29.82% 67.25% $498,813 $2,917 $8,751 0 0
Renee D. Kierans 2 7 3.5 0 0 0 0% 0% $6,000 $857 $3,000 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
Mike Chambers 21 38 1.81 14 7 10 36.84% 81.58% $103,288 $2,718 $4,918 0 0
Renee D. Kierans 1 5 5 0 0 0 0% 0% $3,074 $615 $3,074 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
Mike Chambers 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Renee D. Kierans 1 1 1 0 0 0 0% 0% $0 $0 $0 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
Mike Chambers 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Renee D. Kierans 1 5 5 1 1 1 20% 60% $20,530 $4,106 $20,530 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 $22,028
Mike Chambers 10 22 2.2 3 5 3 13.64% 50% $21,786 $990 $2,179 0 0
Renee D. Kierans 1 1 1 0 0 0 0% 0% $66 $66 $66 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
Mike Chambers 5 12 2.4 3 0 2 25% 41.67% $27,165 $2,264 $5,433 0 0
Renee D. Kierans 3 12 4 0 0 0 0% 0% $8,814 $735 $2,938 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
Mike Chambers 25 73 2.92 6 12 7 8.22% 34.25% $215,780 $2,956 $8,631 0 0
Renee D. Kierans 5 16 3.2 1 0 1 6.25% 12.5% $21,857 $1,366 $4,371 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
Mike Chambers 27 83 3.07 10 12 14 12.05% 43.37% $312,059 $3,760 $11,558 0 0
Renee D. Kierans 1 8 8 2 0 1 25% 37.5% $15,644 $1,956 $15,644 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
Mike Chambers 33 99 3 14 18 15 14.14% 47.47% $595,068 $6,011 $18,032 1 3
Renee D. Kierans 4 27 6.75 1 3 2 3.7% 22.22% $22,077 $818 $5,519 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
Mike Chambers 25 104 4.16 17 7 20 16.35% 42.31% $458,767 $4,411 $18,351 0 1
Renee D. Kierans 3 21 7 3 2 3 14.29% 38.1% $46,848 $2,231 $15,616 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
Mike Chambers 29 112 3.86 18 21 11 16.07% 44.64% $440,497 $3,933 $15,190 1 4
Renee D. Kierans 1 9 9 1 2 2 11.11% 55.56% $22,059 $2,451 $22,059 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
Mike Chambers 59 278 4.71 58 43 33 20.86% 48.2% $507,310 $1,825 $8,598 0 3
Renee D. Kierans 1 13 13 3 0 1 23.08% 30.77% $15,684 $1,206 $15,684 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
Mike Chambers 77 358 4.65 66 59 58 18.44% 51.12% $607,945 $1,698 $7,895 0 2
Renee D. Kierans 2 5 2.5 0 0 0 0% 0% $2,577 $515 $1,289 0 0