DERBY WATCH: Kentucky Derby next stop for Spiral winner Black Onyx http://www.drf.com/news/kentucky-derby-next-stop-spiral-winner-black-onyx http://www.drf.com/news/santa-anita-derby-favorite-hear-ghost-turns-sharp-six-furlong-workout http://www.drf.com/news/florida-derby-contender-shanghai-bobby-works-louisiana-derby-prospect-palace-malice Kentucky Derby Future Wager: Mutuel field surpasses Verrazano for favoritism http://www.drf.com/news/kentucky-derby-future-wager-mutuel-field-surpasses-verrazano-favoritism