Right-hander Casey Sadler will be recalled from Indianapolis to make his first Major League start against the Brewers.
Liriano is expected to merge back into the rotation on Wednesday, against the Detroit Tigers at PNC Park.
Obviously, Sadler has yet to make an appearance with the Triple-A Indians, whose International League season did not begin until Thursday. With the Bucs this spring, Sadler made four exhibition appearances, including three starts, and allowed three runs in 8 1/3 innings, with eight strikeouts and two walks.
Sadler, 24, made his big league debut last season. In six long-relief appearances with the Pirates, he allowed 12 hits and nine runs in 10 1/3 innings.
Tom Singer is a reporter for MLB.com and writes an MLBlog Change for a Nickel. Follow him on Twitter @Tom_Singer. This story was not subject to the approval of Major League Baseball or its clubs.