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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
Mark Jensen 2 11 5.5 0 3 2 0% 45.45% $9,140 $831 $4,570 0 0
Tina Chamberlin 3 8 2.67 0 1 0 0% 12.5% $5,367 $671 $1,789 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
Mark Jensen 4 5 1.25 0 0 0 0% 0% $1,253 $251 $313 0 0
Tina Chamberlin 7 34 4.86 2 3 3 5.88% 23.53% $31,783 $935 $4,540 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 $22,031
Mark Jensen 4 7 1.75 5 0 1 71.43% 85.71% $19,770 $2,824 $4,943 0 0
Tina Chamberlin 6 36 6 2 5 4 5.56% 30.56% $47,047 $1,307 $7,841 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
Mark Jensen 6 11 1.83 1 3 3 9.09% 63.64% $8,326 $757 $1,388 0 0
Tina Chamberlin 7 22 3.14 4 1 5 18.18% 45.45% $67,832 $3,083 $9,690 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
Mark Jensen 3 5 1.67 1 1 2 20% 80% $6,616 $1,323 $2,205 0 0
Tina Chamberlin 3 20 6.67 1 4 2 5% 35% $17,477 $874 $5,826 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
Mark Jensen 3 6 2 1 1 1 16.67% 50% $4,884 $814 $1,628 0 0
Tina Chamberlin 1 1 1 0 0 0 0% 0% $105 $105 $105 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
Mark Jensen 15 43 2.87 3 0 4 6.98% 16.28% $18,319 $426 $1,221 0 0
Tina Chamberlin 3 13 4.33 0 0 3 0% 23.08% $4,685 $360 $1,562 0 0