Man o' War was bred on March 29, 1917 and was later put on price on the August 17, 1918 as a yearling to Samuel D. Riddle of Ney York for $5,000. At two, 'Big Red' had started racing. This was his starting career and had at all times had 1-100 odds to his name. He had a mean wins of 9.42 lengths and in his 9 races among them six at two, he supported 130 pounds. At three he had 135 and 138 pounds. He is remembered for breaking and setting records most notably the two world records, Online Betting Review and five American records.