Donut, took this from TrueNicks.
The TrueNicks Enhanced Report for Union Rags does show that three of the four horses that have shown the most stamina of Dixie Union’s stakes winners—Gone Astray, Dixie City, and Grasshopper—are all, like Union Rags, products of the Dixie Union/Mr. Prospector cross. That cross has produced no less than 17 stakes winners from 114 starters (11%), eight of them graded. Despite the successes of Gone Astray, Dixie City, and Grasshopper, the average winning distances for the colts bred on the cross is 7.03 furlongs, slightly less than the average distance over which they have been asked to race, indicating that the nick is not exactly a source of stamina.