At least five candidates are being readied for the $200,000 Derby Trial, which opens the spring meet at Churchill on Saturday with a program that starts at 6 p.m. Eastern. Those 3-year-olds likely for the one-mile Trial include Dominus, J J’s Lucky Train, Machen, Ruler On Ice, and Travelin Man. The Trial, worth $124,000 to the winner, will be run at 9:39 p.m.