Horses entered in the 2015 Florida Derby include Materiality, Upstart and Ami's Flatter. These horses finished first, second and third, respectively, with Materiality winning the $1 million race by a 1 1/2 length over Upstart. It was Materiality's third first-place finish in a row.
Nine horses, all 3 years old, competed in the race. The oddsmakers anticipated the race coming down to Materiality and Upstart, as they gave the former nine to five odds and the latter even odds. The next closest was Itsaknockout, with five to one odds. Itsaknockout finished fourth. Ami's Flatter had seven to one odds.
The odds for the top two horses were accurate, as Materiality and Upstart spent most of the race well ahead of the rest of the pack. The two were close at the 3/4 and 1 mile marks, but Materiality secured and held the lead during the 1 1/8 mile race's stretch run. No other horses were close, as Ami's Flatter finished 12 1/2 lengths behind Upstart, but three lengths ahead of Itsaknockout.
As of 2015, Alto Racing owns Materiality, and Todd A. Pletcher trains the horse. Upstart's owner is Ralph M. Evans, and the horse's trainer is Richard A. Violette, Jr. Ivan Dalos owns Ami's Flatter.