Niatross went on to beat all of his competition easily in future starts, frequently setting track records, including a new race, track and Canadian record during the prestigious Prix d'Été at Blue Bonnets racetrack in Montreal, Quebec. He also won the Gaines Memorial at Vernon Downs, the Oliver Wendell Holmes Pace at the Meadowlands, the Dancer Memorial at Freehold and the American Classic at Hollywood Park. In the Little Brown Jug Niatross recorded wins in straight heats of 1.55 and 1.54.4 setting six world records before a record Jug crowd of 45,621. He then won the Messenger Stakes to complete the Triple Crown. A December appearance at Pompano Park, his last career race, brought a crowd of more than 23,000.