This page may contain affiliate links to legal sports betting partners. If you sign up or place a wager, FOX Sports may be compensated. Read more aboutSports Betting on FOX Sports. The Kentucky Derby is one of the biggest betting events in sports, combining fast-paced action, shifting odds, and huge payout potential all in one race. If youre getting involved, understanding how everything worksfrom odds to appsgives you a real edge before the horses even leave the gate. Start with the basics: odds in horse racing are pari-mutuel, meaning they change based on how much money is being placed on each horse. Favorites will have shorter odds, while longshots can deliver massive returns. Post positions also matter more than most beginners realizeinside posts can offer early positioning advantages, while outside draws may require a faster break to stay competitive heading into the first turn at Churchill Downs. FanDuel + FanDuel Racing FanDuel is one of the most accessible betting ecosystems because it combines a top-tier sportsbook with a dedicated racing platform under one account. Welcome offers (2026): How it works:You sign up once and use the same wallet for both sportsbook and racing. This is a major advantage for Derby bettorsyou can claim a larger sportsbook bonus, then place horse racing bets through the racing tab. Where its legal: Key edge:Best all-around flexibility + shared wallet between sportsbook and racing. DraftKings + DraftKings Racing DraftKings has expanded heavily into horse racing and now integrates it directly into its platform in select states. Welcome offers (2026): How it works:DraftKings Racing is integrated into the main app in eligible states, meaning you dont need a separate login. Funds can often be shared depending on location. Where its legal: Key edge:Strong odds interface and one of the widest legal footprints in the U.S. BetMGM + BetMGM Racing BetMGM operates similarly but separates its racing platform more clearly from its sportsbook. Welcome offers (2026): How it works:Unlike FanDuel, BetMGM Racing may require a separate interface or app depending on your state. The sportsbook itself does not directly handle pari-mutuel racing bets. Where its legal: Key edge:Strong promotions and consistent bonus structure across major states. Odds *Odds may differ each site*