[1][2] Bowlan made his professional debut with the rookie–level Idaho Falls Chukars, going 1–4 with a 6.94 ERA over 35 innings.

Bowlan started 2019 with the Single–A Lexington Legends and was promoted to the High–A Wilmington Blue Rocks during the season.

[8] He split the 2022 season between the Double–A Northwest Arkansas Naturals, High–A Quad Cities River Bandits, and rookie–level Arizona Complex League Royals.

In 17 total starts, he posted a combined 1–4 record and 5.92 ERA with 62 strikeouts in 62+1⁄3 innings pitched.

[10] In 24 games (21 starts) split between Northwest Arkansas and the Triple–A Omaha Storm Chasers, he registered a cumulative 7–11 record and 5.91 ERA with 105 strikeouts in 102.0 innings of work.