[3] He split the campaign between the rookie–level Arizona League Brewers, Single–A Wisconsin Timber Rattlers, and Double–A Biloxi Shuckers.
In 16 games split between the three affiliates, Contreras accumulated a 4–4 record and 2.86 ERA with 73 strikeouts across 50+1⁄3 innings pitched.
[6] In 2022, he made 35 appearances out of the bullpen for Biloxi and the Triple–A Nashville Sounds, compiling a 3.88 ERA with 73 strikeouts across 51 innings of work.
[7] Contreras split the 2023 campaign between Biloxi and Nashville, making 39 total appearances and registering a 4–3 record and 4.55 ERA with 90 strikeouts across 63+1⁄3 innings.
[10] In 19 games for the Triple–A Sugar Land Space Cowboys, he recorded a 1.40 ERA with 20 strikeouts across 19+1⁄3 innings pitched.