Playing for the school's varsity baseball for his last three years of high school as a two-way player, on varsity he recorded a .372 batting average, 73 hits and 3 career home runs, while winning 13 games on the mound, recording a 1.21 earned run average (ERA) and 122 career strikeouts.

[4] Shortly after signing, he began his professional career with the Orem Owlz of the Rookie Pioneer League where he did not allow a run in eight innings.

[5] Mahle was then promoted to the Burlington Bees which are in the Low–A Midwest League, where he recorded a 3.38 ERA while allowing only 20 hits in 20 innings pitched.

[6] On April 13, Mahle made his MLB debut, pitching one scoreless inning with one strikeout against the Oakland Athletics.

[8] Mahle split the rest of 2017 between the Double–A Mobile BayBears and Triple–A Salt Lake, pitching to a cumulative 10–4 record and 4.77 ERA.

In 2019, Mahle split the season between Mobile and Salt Lake, registering a 4–7 record and a 4.41 ERA in 87+2⁄3 innings of work.

His contributions helped the Cougars win the Miles Wolff Cup over the Winnipeg Goldeyes, their first since joining the American Association in 2021 and their third Championship in franchise history.