CHICAGO (AP) — Monday night’s game between the Washington Nationals and Chicago White Sox has been postponed by rain.

It will be made up as a straight doubleheader on Tuesday.

Each team pushed its pitching rotation back one day.

Washington’s Trevor Williams will face fellow right-hander Chris Flexen in the opener of the doubleheader. Williams is looking for his third consecutive win, and Flexen is 2-0 with a 1.69 ERA in his last three starts.

Nationals left-hander Mitchell Parker and White Sox right-hander Erick Fedde take the mound in the second game. Fedde began his major league career with Washington and is facing his former club for the first time.

Chicago won three of four against Cleveland in its previous series. The White Sox are 9-7 since they dropped 22 of their first 25 games this season.

Washington has split its last six games. It dropped two of three at Boston over the weekend.