 In his first full season in the majors, Duvall played in 150 games and posted a .241 batting average, 33 home runs, and 103 RBI.On April 18, 2017, Duvall hit his first career grand slam off of Kevin Gausman as the Reds won 9–3 over the Baltimore Orioles.On July 14th, with the bases loaded, Duvall hit his first career walk-off in the 11th inning off of T. J. McFarland of the Diamondbacks to give Cincinnati a 4–3 victory.