The Matron Stakes is a Group 1 flat horse race in Ireland open to thoroughbred fillies and mares aged three years or older. It is run at Leopardstown over a distance of 1 mile, and it is scheduled to take place each year in September. From Wikipedia
A whip-rule breach at Royal Ascot prompted a 14-day suspension that rules Carroll out of riding Cercene in the Juddmonte Irish Oaks.