Page "Secretariat (horse)" Paragraph 20

Three weeks after his win at Belmont, Secretariat shipped to Chicago, and easily won the Arlington Invitational at Arlington Park.

He went to Saratoga, for the Whitney Stakes.

Racing against older horses for the first time he was beaten by the Allen Jerkens-trained Onion, a four-year-old gelding.

Onion led from the start and led Secretariat by a head on the final turn before pulling ahead in the straight to win by a length.

A record crowd of over 30, 000 witnessed what was described as an " astonishing " upset.

He then won the inaugural Marlboro Cup against a field that included Secretariat's stablemate, the 1972 Derby and Belmont Stakes winner Riva Ridge, top California stakes winner Cougar II, Canadian champion Kennedy Road, Onion, Travers winner Annihilate ' Em, and the 1972 American champion three-year-old male horse Key to the Mint.

Secretariat ran 1: 45 for 1 miles, then a world record for the distance.