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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
Donald G. Horrell 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Mark A. Hennig 31 97 3.13 10 14 10 10.31% 35.05% $665,274 $6,858 $21,460 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
Donald G. Horrell 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Mark A. Hennig 49 222 4.53 20 21 27 9.01% 30.63% $1,625,313 $7,321 $33,170 1 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
Donald G. Horrell 4 9 2.25 0 1 2 0% 33.33% $11,190 $1,243 $2,798 0 0
Mark A. Hennig 60 210 3.5 16 25 26 7.62% 31.9% $1,744,233 $8,306 $29,071 1 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
Donald G. Horrell 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Mark A. Hennig 57 226 3.96 28 21 45 12.39% 41.59% $1,835,820 $8,123 $32,207 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
Donald G. Horrell 2 8 4 0 1 2 0% 37.5% $6,605 $826 $3,303 0 0
Mark A. Hennig 59 233 3.95 20 24 29 8.58% 31.33% $1,419,200 $6,091 $24,054 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
Donald G. Horrell 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Mark A. Hennig 58 214 3.69 22 26 28 10.28% 35.51% $1,398,668 $6,536 $24,115 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
Donald G. Horrell 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Mark A. Hennig 66 185 2.8 20 22 19 10.81% 32.97% $1,196,582 $6,468 $18,130 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
Donald G. Horrell 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Mark A. Hennig 75 267 3.56 31 37 31 11.61% 37.08% $2,454,341 $9,192 $32,725 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
Donald G. Horrell 1 2 2 0 0 0 0% 0% $705 $353 $705 0 0
Mark A. Hennig 55 235 4.27 32 30 43 13.62% 44.68% $2,542,163 $10,818 $46,221 2 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
Donald G. Horrell 1 1 1 0 0 0 0% 0% $75 $75 $75 0 0
Mark A. Hennig 49 199 4.06 22 27 27 11.06% 38.19% $1,510,357 $7,590 $30,824 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
Donald G. Horrell 1 1 1 0 0 0 0% 0% $105 $105 $105 0 0
Mark A. Hennig 56 194 3.46 25 28 19 12.89% 37.11% $1,596,841 $8,231 $28,515 2 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
Donald G. Horrell 3 8 2.67 0 0 1 0% 12.5% $2,223 $278 $741 0 0
Mark A. Hennig 61 233 3.82 25 26 38 10.73% 38.2% $1,434,219 $6,155 $23,512 2 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
Donald G. Horrell 5 20 4 0 0 1 0% 5% $4,875 $244 $975 0 0
Mark A. Hennig 54 217 4.02 31 22 35 14.29% 40.55% $1,801,799 $8,303 $33,367 2 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
Donald G. Horrell 0 0 0 0 0 0 0% 0% $0 $0 $0 0 0
Mark A. Hennig 63 277 4.4 45 48 35 16.25% 46.21% $2,357,744 $8,512 $37,425 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
Donald G. Horrell 6 15 2.5 1 0 2 6.67% 20% $5,278 $352 $880 0 0
Mark A. Hennig 67 232 3.46 20 26 29 8.62% 32.33% $1,087,964 $4,690 $16,238 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
Donald G. Horrell 4 18 4.5 4 0 4 22.22% 44.44% $12,494 $694 $3,124 0 0
Mark A. Hennig 57 276 4.84 36 53 36 13.04% 45.29% $1,474,622 $5,343 $25,871 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
Donald G. Horrell 3 15 5 2 1 1 13.33% 26.67% $16,118 $1,075 $5,373 0 0
Mark A. Hennig 71 328 4.62 30 43 50 9.15% 37.5% $1,320,692 $4,027 $18,601 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
Donald G. Horrell 4 23 5.75 2 2 3 8.7% 30.43% $20,220 $879 $5,055 0 0
Mark A. Hennig 89 424 4.76 52 50 42 12.26% 33.96% $2,123,132 $5,007 $23,855 2 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
Donald G. Horrell 7 41 5.86 5 6 5 12.2% 39.02% $43,924 $1,071 $6,275 0 0
Mark A. Hennig 102 463 4.54 64 80 71 13.82% 46.44% $3,386,804 $7,315 $33,204 3 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
Donald G. Horrell 9 39 4.33 5 4 2 12.82% 28.21% $38,867 $997 $4,319 0 0
Mark A. Hennig 100 417 4.17 58 58 55 13.91% 41.01% $2,897,246 $6,948 $28,972 2 15

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
Donald G. Horrell 11 75 6.82 8 4 11 10.67% 30.67% $63,351 $845 $5,759 0 0
Mark A. Hennig 100 378 3.78 57 56 53 15.08% 43.92% $2,388,983 $6,320 $23,890 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
Donald G. Horrell 11 82 7.45 9 8 13 10.98% 36.59% $78,027 $952 $7,093 0 0
Mark A. Hennig 105 413 3.93 75 58 61 18.16% 46.97% $4,209,607 $10,193 $40,091 6 14

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
Donald G. Horrell 17 89 5.24 6 10 10 6.74% 29.21% $61,959 $696 $3,645 0 0
Mark A. Hennig 115 516 4.49 72 100 66 13.95% 46.12% $3,957,798 $7,670 $34,416 2 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
Donald G. Horrell 20 113 5.65 10 20 14 8.85% 38.94% $112,777 $998 $5,639 0 0
Mark A. Hennig 125 503 4.02 73 85 74 14.51% 46.12% $3,954,020 $7,861 $31,632 4 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
Donald G. Horrell 23 91 3.96 18 7 10 19.78% 38.46% $157,021 $1,726 $6,827 0 0
Mark A. Hennig 112 478 4.27 79 71 57 16.53% 43.31% $5,814,441 $12,164 $51,915 16 26

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
Donald G. Horrell 18 62 3.44 6 11 4 9.68% 33.87% $95,119 $1,534 $5,284 0 0
Mark A. Hennig 116 495 4.27 85 77 70 17.17% 46.87% $4,973,124 $10,047 $42,872 14 22

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
Donald G. Horrell 17 68 4 5 5 7 7.35% 25% $67,531 $993 $3,972 0 0
Mark A. Hennig 98 447 4.56 71 63 49 15.88% 40.94% $3,932,254 $8,797 $40,125 7 12

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
Donald G. Horrell 22 87 3.95 9 10 7 10.34% 29.89% $82,999 $954 $3,773 0 0
Mark A. Hennig 104 491 4.72 73 60 69 14.87% 41.14% $3,042,651 $6,197 $29,256 4 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
Donald G. Horrell 28 114 4.07 8 11 8 7.02% 23.68% $108,426 $951 $3,872 0 0
Mark A. Hennig 98 416 4.24 63 58 60 15.14% 43.51% $3,732,529 $8,972 $38,087 9 12

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
Donald G. Horrell 25 113 4.52 5 11 8 4.42% 21.24% $72,532 $642 $2,901 0 0
Mark A. Hennig 91 432 4.75 73 68 53 16.9% 44.91% $2,877,532 $6,661 $31,621 4 12

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
Donald G. Horrell 32 129 4.03 9 6 13 6.98% 21.71% $62,549 $485 $1,955 0 0
Mark A. Hennig 81 428 5.28 72 74 54 16.82% 46.73% $2,617,748 $6,116 $32,318 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
Donald G. Horrell 62 228 3.68 22 23 24 9.65% 30.26% $93,381 $410 $1,506 0 0
Mark A. Hennig 64 325 5.08 56 53 49 17.23% 48.62% $2,464,677 $7,584 $38,511 5 12

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
Donald G. Horrell 53 258 4.87 40 32 35 15.5% 41.47% $114,978 $446 $2,169 0 0
Mark A. Hennig 57 223 3.91 36 35 25 16.14% 43.05% $1,939,950 $8,699 $34,034 6 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
Donald G. Horrell 44 161 3.66 20 21 14 12.42% 34.16% $76,007 $472 $1,727 0 0
Mark A. Hennig 37 229 6.19 49 43 26 21.4% 51.53% $3,986,802 $17,410 $107,751 10 19

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
Donald G. Horrell 47 225 4.79 20 26 33 8.89% 35.11% $86,677 $385 $1,844 0 0
Mark A. Hennig 30 100 3.33 13 16 11 13% 40% $502,926 $5,029 $16,764 0 0