In 1913, Feustel conditioned Belmont's colt Rock View to American Champion Three-Year-Old Male Horse honors with wins in several major races including the Brooklyn Derby and the Travers Stakes.

[1] Riddle's reluctant purchase was named Man o' War and Louis Feustel prepared the colt for the 1919 racing campaign at training facilities in Maryland.

The trainer brought him along slowly and after making his debut in mid year, Man o' War won nine of his ten starts and earned American Champion Two-Year-Old Colt honors.

The term Triple Crown did not come into use until 1930 and in February 1920 Sam Riddle announced that Man o' War would not make the long train journey south to run in the Kentucky Derby.

Following its formation, both Feustel and the horse would be inducted in the National Museum of Racing and Hall of Fame and in the Blood-Horse magazine List of the Top 100 U.S. Racehorses of the 20th Century, Man o' War was ranked Number one.

[2] Although Feustel won the May 1922 Newtown Stakes and Richmond Handicap with Sam Riddle's horses, by the end of the year he was once again training all of the August Belmont, Jr.