The 146th running of the Kentucky Derby is Saturday, resuming after a four month delay due to the pandemic. While the event brings more attention and eyeballs to the sport of horse racing, the Derby also invokes a conversation surrounding the sport’s biggest crisis. The new ESPN podcast series "Bloodlines" looks into the deaths of horses at California’s Santa Anita racetrack, since a spike in fatalities began in 2019. Animal rights activists have been calling for reforms and even pushing for horse racing to be shut down altogether. The controversy has raised numerous questions about the complicated relationship between horses and the Bloodlines, and how the “sport of kings” found itself in jeopardy.