Rea will start Saturday's game against the Brewers, Jordan Bastian of MLB.com reports.
The Cubs need to make some adjustments to their rotation after Tyler Chatwood was scratched from his scheduled start Friday. Rea served mainly as a starter in the minors and in past major-league appearances but came out of the bullpen twice to begin the 2020 season, tossing three scoreless innings while allowing just one hit and striking out three.