On July 4, 2007, Chestnut won the 92nd Annual Nathan's Hot Dog Eating Contest, beating six-time defending champion Takeru "Tsunami" Kobayashi by consuming a world record 66 hot dogs and buns (HDB) in 12 minutes, after losing to Kobayashi in 2005 and 2006.
he following year, he successfully defended his title by winning a five hot dog eat-off after tying Kobayashi in consuming 59 HDB in ten minutes. On July 4, 2009, Chestnut beat Kobayashi again, by consuming a world record 68 HDB and winning his third consecutive title. On July 4, 2010, Chestnut took home his 4th consecutive Mustard Belt eating 54 HDB.
he 2010 contest was a runaway victory, as Kobayashi did not compete due to a contract dispute with Major League Eating. On July 4, 2011, he won his fifth-consecutive championship with 62 HDB. 2012 marked his sixth consecutive win, when Chestnut tied his own world record from 2009 by devouring 68 HDB. In 2013, Chestnut captured his seventh straight title, eating a total of 69 HDB, breaking his previous world record. In 2014, Chestnut captured his eighth straight title eating a total of 61 HDB.
In a decisive chowdown comeback, women's record-holder Miki Sudo downed 40 wieners and buns to win the women's title after skipping last year's frank fest because she was pregnant.