CHICAGO -- The White Sox will move Brad Keller into the starting rotation and Michael Soroka into the bullpen, manager Pedro Grifol announced prior to Tuesday afternoon¡¯s doubleheader against the Nationals at Guaranteed Rate Field.

Keller will follow Mike Clevinger to the mound this weekend at Yankee Stadium, getting the call on Saturday afternoon.

¡°I¡¯ve talked to both of them already. We¡¯re excited to see what Keller can do in the rotation. I¡¯ve seen him really good as a starter,¡± Grifol said. ¡°And then Soroka, he¡¯s got some adjustments to make that we feel can really help him.

¡°We did the same thing with [Chris] Flexen. He pitched out of the bullpen, he threw a couple times, threw the ball great. Now he¡¯s in the rotation. The same with Soroka: ¡®Let¡¯s take a step back, go in the bullpen, pitch with some length over there in the bullpen and see what happens.¡¯ Doesn¡¯t mean he¡¯s going to be there permanently. It just means right now, ¡®Let¡¯s go ahead and get you back there, make some adjustments, give you the ball, maintain the length, try to not detrain and move forward.¡¯¡±

Soroka, 26, has an 0-5 record with a 6.39 ERA over nine starts this season. He has yielded 10 home runs, tied with San Diego¡¯s Michael King and Joe Musgrove for the Major League lead, while walking 24 and striking out 24 over 43 2/3 innings.

In his most recent start against the Guardians on Sunday, the right-hander gave up five runs (four earned), including a pair of game-changing homers, over 5 1/3 innings.

¡°Kind of found a couple of keys over the last couple starts, and that¡¯s who I am. Go out there and fill it up,¡± said Soroka after the start. ¡°You get beat sometimes, but you keep going out there and letting it rip. Thought I held stuff pretty well late into the game.¡±

¡°He¡¯s a competitor. He wants to continue to pitch,¡± Grifol added of Soroka on Tuesday. ¡°However, he understands that there¡¯s adjustments that he needs to make. He also understands that we believe in him. I truly believe in the player. I saw it. He¡¯s actually stronger. He¡¯s more physical now than he was. He¡¯s got more experience. He¡¯s faced some adversity and dealt with it.¡±

On Monday, Grifol watched video of Soroka from a National League Division Series victory over the Cardinals in 2019, when the right-hander was with the Braves, and compared those offerings to another video screen featuring Soroka¡¯s Sunday start. There were pitches thrown by Soroka in that game vs. Cleveland that mimicked his Oct. 6 effort in St. Louis, when he struck out seven and allowed two hits and one run over seven innings.

¡°In the playoff game, it was one after the other. The consistency was impeccable,¡± Grifol said. ¡°Scouting background like I have, and I learned from old-time scouts, if you see it once, it¡¯s there. We¡¯ve got to get it out of him.

¡°I saw it more than once. I saw a great breaking ball to [Jos¨¦] Ram¨ªrez. I saw an uptick in velocity to 95 [mph]. I saw movement to his two-seamer that mimicked 2019. Now it¡¯s our responsibility and his responsibility to try to get that consistently like he had it. And there¡¯s no doubt that I think he can.¡±

Keller, 28, is 0-1 with a 2.84 ERA over four games, including one start at St. Louis on May 3. Nick Nastrini, the White Sox No. 8 prospect, according to MLB Pipeline, and Jonathan Cannon (No. 11) also are rotation options at Triple-A Charlotte, with Cannon having made three big league starts this season and Nastrini having made two.