Adam Lynn Duvall (born September 4, 1988) is an American professional baseball first baseman for the San Francisco Giants of Major League Baseball (MLB).
Duvall played college baseball at Western Kentucky University, Chipola College and the University of Louisville. He was drafted by the San Francisco Giants in the 11th round of the 2010 Major League Baseball Draft. He made his professional debut that season for the Salem-Keizer Volcanoes. In 2012, while playing for the San Jose Giants, he led all Class A players with 30 home runs.
Duvall was added to the 40-man roster on November 20, 2013. He started the 2014 season with the Triple-A Fresno Grizzlies.
Duvall was called up to the majors on June 26, 2014. He hit a home run in his first MLB game. He was sent back down to the Grizzlies on July 4 due to the return of injured Brandon Belt.
Duvall was diagnosed with type 1 diabetes in 2012.