Bilous had his contract selected by the White Sox on Friday, LaMond Pope of the Chicago Tribune reports.
Chicago added Bilous to the 40-man roster in order to protect him from the Rule 5 draft. The right-hander opened 2021 at Low-A but spent most of the campaign at Double-A, where he posted a 6.51 ERA, 1.55 WHIP and 80:30 K:BB in 65 innings (17 starts).