| Roman Ruler | |
| Breed: | Thoroughbred |
| Sire: | Fusaichi Pegasus |
| Grandsire: | Mr. Prospector |
| Dam: | Silvery Swan |
| Damsire: | Silver Deputy |
| Sex: | Stallion |
| Foaled: | 2002 |
| Death Date: | 2017 |
| Country: | USA |
| Color: | Dark bay stallion |
| Breeder: | Needham/Betz, Liberation Fm & Ashford Stud |
| Owner: | Fog City Stable |
| Trainer: | Bob Baffert |
| Record: | 10:5-2-1[1] |
| Earnings: | $1,220,800 |
| Wins: | Norfolk Stakes (2004) Best Pal Stakes (2004) Dwyer Stakes (2005) Haskell Invitational (2005) |
Roman Ruler (March 20, 2002 – January 25, 2017) was an American Thoroughbred racehorse, winner of the 2005 Haskell Invitational.
Roman Ruler's first race was on June 19, 2004, at Hollywood Park Racetrack, where he won on his debut. He followed it up with a win at the 2004 Best Pal Stakes on August 15, 2004. He then captured his third win of the year on October 3, 2004, in the Norfolk Stakes.[2]
Ruler's next win came on July 4, 2005, in the Dwyer Stakes and on August 7, 2005, he won the 2005 Haskell Invitational.
He finished his career off with a second-place finish in the Goodwood Breeders' Cup Handicap, before retiring. Due to his successful year in 2005, he ranked 22nd place in the Top 100 Rankings.
Roman Ruler died on January 25, 2017.[3]
Roman Ruler's descendants include:[4]
| Foaled | Name | Sex | Major Wins |
| 2007 | Rule | c | Monmouth Cup, Sam F. Davis Stakes, Delta Jackpot Stakes |
| 2008 | Ruler on Ice | c | Belmont Stakes |
| 2009 | Homeboykris | c | Champagne Stakes[5] |
| 2011 | Artemis Agrotera | f | Gallant Bloom Handicap, Ballerina Stakes, Frizette Stakes[6] |
| 2014 | Roman Rosso | c | Gran Premio Asociación Latinoamericana de Jockey Clubes e Hipódromos |