He split the 2013 season between the Single-A Lake County Captains and the High-A Carolina Mudcats, accumulating a 2–6 record and 4.14 ERA in 19 games.

Peoples reached Triple-A for the first time in 2016 with the Columbus Clippers, but spent the majority of the in Double-A with the Akron RubberDucks, notching a 13–6 record and 3.65 ERA.

Peoples again played for Columbus and Akron in 2018, pitching to a 5.28 ERA in only 10 games, missing much of the year due to a right foot contusion and a right elbow sprain.

In 2021, Peoples appeared in 18 games for Yokohama, posting a 3-4 record and 4.21 ERA with 41 strikeouts in 47.0 innings pitched.

On January 24, 2023, Peoples was hired by the Seattle Mariners organization to serve as the pitching coach for their Double-A affiliate, the Arkansas Travelers.