Lucas Giolito's White Sox debut will be pushed back a day.
Originally scheduled to start Monday, Giolito will make his team debut on Tuesday now, manager Rick Renteria said on Saturday. Giolito will take Reynaldo Lopez's place in the rotation as he recovers from a strained back.
The White Sox also made some other pitching rotation changes.
Carlos Rodon and Carson Fulmer will be the two starters for Monday's doubleheader against the Minnesota Twins. Renteria said that Fulmer — who will be making his season debut — will serve as the 26th man and then head back to Triple-A Charlotte.
In 24 starts this season with the Knights, the 23-year-old prospect is 7-8 with a 5.61 ERA and 95 strikeouts.
After leaving Thursday's game with soreness, the White Sox are taking a cautious approach with pitching prospect Reynaldo Lopez.
The White Sox announced on Saturday they have placed Lopez on the 10-day disabled list with a strained back and purchased the contract of pitcher Danny Farquhar from Triple-A Charlotte.
White Sox pitching coach Don Cooper noticed Lopez losing both his velocity and command in the fourth inning of his start against the Texas Rangers on Thursday night which prompted a mound visit from manager Rick Renteria and head athletic trainer Herm Schneider. After initially walking back toward the dugout, White Sox first baseman Jose Abreu signaled for Renteria and Schneider to return. Lopez was pulled from the game just moments later.
Lopez is 0-1 with a 6.97 ERA in two starts with the White Sox after getting promoted to the majors on Aug. 11.
Farquhar, 30, signed with the White Sox in July after he was released by the Tampa Bay Rays.
In eight games with Triple-A Charlotte, Farquhar had a 3.00 ERA with a 0.880 WHIP and 12 strikeouts.
The veteran reliever has played in parts of six MLB seasons with the Toronto Blue Jays (2011), Seattle Mariners (2013-15) and Rays (2016-17). Farquhar has a career record of 7-14 with 18 saves and a 3.85 ERA in 230 games.
The White Sox 40-man roster is now at 36 after Saturday's move.