Akron RubberDucks
On July 28, 2015, the Angels traded Stamets to the Cleveland Indians for David Murphy. He played for the Akron RubberDucks of the Class AA Eastern League following the trade. The Indians invited Stamets to spring training in 2016. In 2016, Stamets played for Akron, batting .258 in 69 games, and the Columbus Clippers of the Class AAA International League, batting .164 in 22 games. He began the 2017 season with Akron and was promoted to Columbus, and he played in the Triple-A All-Star Game. He batted .259 with 16 home runs and 52 RBIs in 116 games. The Indians added Stamets to their 40-man roster following the 2017 season. In 2018, he missed the first 25 games with a back injury.