In 2015, Uelmen's freshman year at Cal Poly, he appeared in 16 games (making one start) in which he went 0–1 with a 7.08 ERA over twenty innings.[2] That summer, he played in the Northwoods League with the Eau Claire Express.[3] As a sophomore at Cal Poly in 2016, Uelmen went 5–3 with a 3.68 ERA, striking out seventy over 93 innings.[4] Following the season, he played in the Cape Cod Baseball League for the Yarmouth-Dennis Red Sox, going 2–1 with a 4.87 ERA over twenty innings.[5] In 2017, his junior season, he pitched to a 4–8 record with a 2.93 ERA over 15 starts, earning Big West Conference Second Team honors.[6] After the season, he was selected by the Chicago Cubs in the fourth round of the 2017 Major League Baseball draft.[7][8]
Professional career
Chicago Cubs
Uelmen signed with the Cubs and made his professional debut with the Eugene Emeralds of the Low–ANorthwest League, compiling a 2.04 ERA over 17+2⁄3 innings.[9] In 2018, he began the season with the South Bend Cubs of the Single–AMidwest League before being promoted to the Myrtle Beach Pelicans of the High–ACarolina League in June.[10] Over 21 games (twenty starts) between the two teams, he went 8–8 with a 3.83 ERA, striking out 82 over 89+1⁄3 innings.[11] Uelmen returned to Myrtle Beach to begin the 2019 season before earning a promotion to the Tennessee Smokies of the Double–ASouthern League in July, with whom he finished the season; over 17 starts with both clubs, he pitched to a 5–6 record with a 4.55 ERA, compiling 76 strikeouts over 91 innings. Following the season, he was selected to play in the Arizona Fall League with the Mesa Solar Sox.[12][13]
Uelmen did not play a minor league game in 2020 due to the cancellation of the minor league season caused by the COVID-19 pandemic.[14] He returned to the Smokies (now members of the Double-A South to begin the 2021 season.[15] He moved into the bullpen during the season, and earned a promotion to the Iowa Cubs of the Triple-A East in mid-August.[16] Over 31 games (11 starts) between the two teams, Uelmen went 2–9 with a 5.78 ERA and 88 strikeouts over 90+1⁄3 innings. He returned to Iowa to begin the 2022 season.
On July 17, 2022, the Cubs selected Uelmen's contract and promoted him to the major leagues.[17] He made his MLB debut on July 22 at Wrigley Field versus the Philadelphia Phillies pitching one inning in relief, giving up one run while striking out a batter.[18] On September 23, Uelmen allowed a hit and two walks in a scoreless inning against the Pittsburgh Pirates to earn his first career save.[19] He was designated for assignment on December 24.
Philadelphia Phillies
On January 4, 2023, Uelmen was traded to the Philadelphia Phillies in exchange for cash considerations.[20] Uelmen was optioned to the Triple-A Lehigh Valley IronPigs to begin the 2023 season.[21] He made only one appearance for Philadelphia, surrendering four runs on three hits with one strikeouts across an inning of work. On September 30, Uelmen was placed on the 60–day injured list with a right flexor strain, ending his season.[22] Following the season on November 6, Uelmen was removed from the 40–man roster and sent outright to Triple–A Lehigh Valley.[23] He elected free agency the same day.[24]