Twenty 3-year-olds line up Saturday at Churchill Downs for the 152nd Kentucky Derby, with a $5 million purse on the line and a post time of 6:57 p.m. Eastern. Aragona sees no standout in this group on the order of a California Chrome or an American Pharaoh, and Beer notes that everyone at this stage of the game is still lightly raced. They agree on Commandment as one of the most reliable horses in the field but split on the top spot, with Beer chasing a longer price. Aragona lands on No. 6 Commandment, trained by Brad Cox, who arrives off wins in the Florida Derby and Fountain of Youth. The colt has won races coming from off the pace and racing up close to it, and Aragona reads that versatility as the strongest argument in a deep field. "He's the one that I rely on to show up and get the trip that he needs," Aragona said.…