Manager David Ross said Mills will open the season as Chicago's fifth starter, Mark Gonzales of the Chicago Tribune reports.

EDGE Analysis

Mills will be tasked with filling in for the injured Jose Quintana (thumb) to start the season. The right-hander impressed in a swingman role for the Cubs in 2019, posting a 2.75 ERA and 42:11 K:BB across 36 innings (nine appearances, four starts).