[4] In 2018, Mlodzinski's freshman year at USC, he pitched 45+2⁄3 innings, going 3–6 with a 5.52 ERA and 21 walks and 43 strikeouts over 19 games (seven starts).

[7] That summer, he returned from the injury, playing for the Falmouth Commodores of the Cape Cod Baseball League and pitching to a 1.83 ERA and 43 strikeouts as opposed to five walks over 34+1⁄3 innings.

[8][9][10] Mlodzinski entered his redshirt sophomore season in 2020 as a top prospect for the 2020 Major League Baseball draft.

[11] He pitched to a 2.84 ERA over four starts before the college baseball season was cut short due to the COVID-19 pandemic.

On June 16, 2023, Mlodzinski was selected to the 40-man roster and promoted to the major leagues for the first time after Rob Zastryzny was placed on the injured list.