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With Fernando Romero back in the minors for at least 10 days, the Twins will alter their five-man rotation for the first time (doubleheaders aside) since the rookie's debut May 2. But they are not completely certain, or at least not ready to announce, how they will do it.

Monday's off day gives the Twins a chance to give everyone an extra day of rest, but manager Paul Molitor said it's more likely Jake Odorizzi will go Thursday vs. the White Sox, on a normal, four-day rest. Assuming Jose Berrios does the same Friday against the Cubs, that means the Twins will need a new starter — someone not on the current roster, Molitor confirmed — Saturday at Wrigley Field.

The candidates include:

Aaron Slegers: He started May 30 for the Twins at Kansas City, pitching 5 1/3 innings and giving up two runs on six hits and a walk. He is 5-5 at Class AAA Rochester.

Adalberto Mejia: The lefty, who spent most of last season in Minnesota, has a 1.38 ERA in his last four starts at Rochester. he made 21 starts for the Twins in 2017.

Zach Littell: He also started once for the Twins, giving up six runs on six hits and four walks in three innings against the White Sox earlier this month. He's 1-3 with a 3.05 ERA in eight games at Rochester after starting the season at Class AA Chattanooga.

Stephen Gonsalves: Gonsalves, considered a top prospect, also started the year at Chattanooga and is 5-3 with a 4.56 ERA in 10 starts at Rochester. He's struck out 47 batters in 47 1/3 innings for the Red Wings.