Royals manager Ned Yost confirmed on Sunday that rookie right-hander Jakob Junis will start on Monday night in Oakland, a move that appeared likely when Trevor Cahill went on the disabled list earlier this week.
Junis joined the Royals here in Chicago on Sunday morning as they concluded a three-game series against the White Sox. The club will wait until Monday to make an official roster move.
Reliever Kevin McCarthy could be the leading candidate to return to the minors. He was called up on Thursday to offer bullpen depth after Cahill landed on the disabled list with rotator cuff weakness.
Junis, 24, has posted a 4.70 ERA in 10 appearances, including seven starts, for the major-league club in 2017. He struck out 37 and walked 16 in 44 innings. His previous start came last Sunday against the Seattle Mariners, when he allowed just one run and four hits in eight innings. Junis was on the roster as the 26th man for the second game of a doubleheader. He struck out seven while retiring the last 19 batters he faced.
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Cahill, 29, yielded 10 earned runs in 11 innings across three starts after being acquired from the San Diego Padres on July 24. In his last start, he survived just 2 1/3 innings against the Cardinals, giving up three runs and issuing five walks.