That number tied the amount consumed by Matt "The Megatoad" Stonie, 24, when he ended Chestnut's eight-year winning streak two years ago.
People for the Ethical Treatment of Animals had members giving away free vegan hot dogs outside the event, but a spokeswoman says the people arrested inside weren't with PETA. Chestnut beat his own record of 70.
Americans will eat an estimated 150 million hot dogs on the holiday.
"I slowed down quite bit", he said.
The good news for those who do not have access to ESPN3 or who are looking to watch the Hot Dog Eating contest on a bigger screen or - I promise I won't judge - at a restaurant is that ESPN will show a tape delayed version of the contest later in the day. In the fury of competition, Sudo's total was shorted by five hot dogs.
In the women's competition, Mikie Sudo, 31 and weighing 126 pounds, won her fourth title in a row by eating 41 hot dogs and buns.
Michelle Lesco finished second with 32½ dogs and buns, while Sonya "Black Widow" Thomas was third with 30 in the contest, which has been held at Coney Island, New York since 1972.
Last year, the Las Vegas resident polished down 38 1/2 dogs, beating out three-time victor Sonya "The Black Widow" Thomas, of Alexandria, Va., with 35. So Chestnut and Stonie, for all their extraordinary powers, could just as easily be seen as everyday patriots.
But ladies first, starting at 11 a.m. three-peat women's champion Miki Sudo will look to top her performance of 38 and a half dogs.
He's taken home the mustard yellow belt nine of the last 10 years.