LOUISVILLE, Ky. - At the beginning of the year, The Cliff's Edge was only the third choice among 3-year-olds in the barn of his trainer, Nick Zito. But while Eurosilver failed to even make the Derby, and Birdstone regressed this spring, The Cliff's Edge came to the fore. Wednesday, The Cliff's Edge was installed as the favorite to beat 19 other 3-year-olds in Saturday's 130th Kentucky Derby at Churchill Downs.