[3] Registered in the United States as Challenger II, the expensive colt never fully recovered from an injury to his hocks and had no success on American racetracks.
[5] His best son was Challedon, a colt born in 1936 whose major wins included the Preakness Stakes, the Pimlico Special, and the Hollywood Gold Cup.
Challedon was voted American Horse of the Year in 1939 and 1940 and, following its formation, was inducted into the National Museum of Racing and Hall of Fame.
In 1942, Challenger sired Gallorette, a filly who regularly beat her male counterparts while winning major events, such as the Brooklyn and Metropolitan Handicaps.
Gallorette was voted the American Champion Older Female Horse of 1946 and, following its formation, was inducted into the National Museum of Racing and Hall of Fame.