Saturday's broadcast averaged 18 million during the race and peaked at 18.5 million for post-race coverage, when first-place finisher Maximum Security was disqualified for interference and Country House was named the winner.
The Derby also benefited Saturday night's NHL playoff game between Columbus and Boston. The game averaged 4.618 million viewers, making it the second-most watched non-Stanley Cup Final NHL game dating to 1993. The deciding game of the 2015 Western Conference final between Chicago and Anaheim averaged 4.636 million.
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