Deetz attended Nixa High School in Nixa, Missouri and played college baseball at the Northeastern Oklahoma A&M College.
Deetz was drafted by the Houston Astros in the 11th round, with the 316th overall selection, of the 2014 Major League Baseball draft.[1][2]
Deetz made his professional debut with the rookie–level Greeneville Astros where he pitched to an 8.88 ERA and 2–4 record in 13 games. He played 2015 with the Low–A Tri-City ValleyCats and Single–A Quad Cities River Bandits, posting a combined 9–3 record and 1.70 ERA in 63+2⁄3 innings pitched between the two clubs, and 2016 with the High–A Lancaster JetHawks and Double–A Corpus Christi Hooks, where he went a combined 8–5 with a 3.76 ERA between both teams. He started 2017 with Corpus Christi and was promoted to the Triple–A Fresno Grizzlies during the season.[3] After going 7–6 with a 4.25 ERA in 16 games between Corpus Christi and Fresno,[4]
the Astros added him to their 40-man roster after the season.[5]
Deetz made his MLB debut on September 5, 2018.[6] He split the 2019 season between the rookie–level Gulf Coast League Astros, Corpus Christi, and Round Rock Express, going a combined 3–0 with a 6.63 ERA over 38 innings. On January 9, 2020, Deetz was designated for assignment, and outrighted to Triple–A on January 16.[7] Deetz did not play in a game in 2020 due to the cancellation of the minor league season because of the COVID-19 pandemic.[8] He became a free agent on November 2.[9]
On May 17, 2021, Deetz signed with the Kansas City Monarchs of the American Association of Professional Baseball.[10] Deetz was released on June 1 after recording an 18.00 ERA in 2 appearances.[10]
On May 11, 2022, Deetz signed with the Sioux Falls Canaries of the American Association of Professional Baseball.[11] In 2022, Deetz recorded a 0–0 record and 297.00 ERA in 2 appearances with the Canaries. On June 4, 2022, Deetz was released by the Canaries.
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