One Line Ruler

One Line Ruler is a 3-year-old filly from the United States, trained by Carrol Castille. She is the offspring of the stallion One Liner and the dam Sheza Roman Ruler. So far in her career, One Line Ruler has won one race. On November 12, 2023, at Delta Downs, she was ridden by Jansen Melancon and achieved her biggest victory to date, winning the $25,800 Maiden Special Weight race by defeating Take Her Away.