[2][3] Kelly split the 2017 season between the Double–A San Antonio Missions and Triple–A El Paso Chihuahuas.

Kelly split the year between Bowie and the Triple–A Norfolk Tides, accumulating a 1–6 record and 8.42 ERA with 62 strikeouts across 31 appearances.

[7] He made 20 appearances (17 starts) for the Blue Crabs, compiling a 3–8 record and 5.34 ERA with 83 strikeouts across 89+1⁄3 innings pitched.

In 41 relief outings between the two affiliates, Kelly accumulated a 5–4 record and 2.70 ERA with 62 strikeouts across 50 innings of work.

[14] The deal included an invitation to the Guardians' 2023 major league spring training camp.

He began the year with the Triple-A Columbus Clippers, where he made 18 appearances and recorded a 1.61 ERA with 36 strikeouts and 2 saves in 22+1⁄3 innings pitched.