Whisk Broom showed high class form during four seasons of racing in Europe, but produced his best performances when returning to America in 1913.

Harry Payne Whitney, who had purchased Whisk Broom, sent the colt to England to be trained by the American Jack Joyner.

[4] Under trainer James G. Rowe Sr. Whisk Broom II became the first of only four horses to win the three races that compose the New York Handicap Triple Crown Series.

[5] Racing in New York State had been severely restricted by the Hart–Agnew Law but in 1913 the sport returned, and the first major event was the Metropolitan Handicap at Belmont Park on May 30.

Whisk Broom was left at the start but soon recovered to take the lead entering the straight and won by a length from G. M. Miller and Meridian in a time of 1:39.00.

There was some skepticism of the time,[8] as no other clocker's figures matched that of the official clock, but even at the slowest estimate, however, he had beaten the American record for the distance.

"[9] A month after his win in the Suburban it was reported that Whisk Broom had gone "badly lame"[10] and would be unlikely to run again in 1913: in fact he never raced again and was retired to stud.