As a three-year-old in 1958, Sindon finished second to the subsequent
Epsom Derby winner
Hard Ridden in the
Irish 2000 Guineas at the
Curragh. In the
Irish Derby at the same course in June he was ridden by
Liam Ward and started at odds of
100/8 in a 12-runner field. He won by a short head from Paddy's Point, who had finished second to Hard Ridden at Epsom, with Royal Highway in third. Later in the year he finished second to Royal Highway in the
Irish St Leger and was then sent to England where he finished second to the filly
Bella Paola in the
Champion Stakes. ==Stud record==