Mister Frisky won the Clasico Santiago Iglesias Pantin PR-III and Clasico Juan Orlando Herrero PR-II. He then broke the seven-furlong track record by 4/5 of a second in winning the PR-III Clasico Dia de Reyes on January 6, 1990, by more than 10 lengths. Next he was taken to the
United States of America to compete in the Derby prep races to try to achieve what
Bold Forbes did back in 1976. Bold Forbes competed in Puerto Rico during the early part of his career before winning the Kentucky Derby. Mister Frisky scored victories at
Santa Anita Park in California. He won the
San Vicente Stakes, the grade II
San Rafael Stakes, and the 1990
Santa Anita Derby and was considered the early favorite for the
Kentucky Derby. Going into the Kentucky Derby, his winning streak of 16 consecutive races was at risk. No other horse has ever had an unbeaten streak of this length going into the Derby. However, Mister Frisky finished eighth as the post-time betting favorite. Two weeks later, he ran third behind winner
Summer Squall in the
Preakness Stakes. A few days after the race, an
abscess was found in his
esophagus. His life was in jeopardy, but he pulled through. It was believed that this lesion contributed to his losses in the Derby and Preakness. Nevertheless, Mister Frisky was named Puerto Rico's 1990 champion imported 3yo colt. He reappeared in August of the next year finishing third in a sprint race at Del Mar. Four weeks later, on August 31, he was a runner up to the previous year's
Belmont Stakes winner,
Go And Go. He never raced again. He was retired with a life record of 20 starts, 16 wins, one second, and two thirds with earnings of $689,393. He set two track records and equalled another one at El Comandante race track, including 1:21 3/5 for 1400m. He was inducted into the Puerto Rican Thoroughbred Racing Hall of Fame in 1991. ==Stud record==