EN
The achievements of 242 thoroughbred race horses by Saragan, Torpid and Kasjan stallions running on the racecourse at the age of 2 and 3 were studied. The data were collected from Racing News and Stud Book. The criteria included: number of races in a season, an average number of races per horse, percentage of wins per horse, an average number of wins per horse, an average sum of money won in a season, an average sum of money won per race, exploatation coefficient, individual coefficient of success. The offsprings by Saragan matured late. They were tough and outstanding on the racecourse at the age of 3. The offsprings by Torpid matured early, won races mainly at the age of 2 although some of them won the race at the age of 3. Małe issue by Saragan and Torpid were more brave than mares but Kasjan's female offsprings won morę of ten than male ones.