In most races, the post-position draw happens out of the public eye. Racing-office officials randomly draw numbers, the starting-gate spot, and match them with the names of entered horses. For some races, tracks try to dress up the draw, making some pomp out of an essentially mundane activity. But if there is one race where the post draw really generates buzz, it’s the Kentucky Derby. With the Derby now annually filled to its 20-horse capacity, who is positioned where can make a tremendous difference in the outcome.