Greg Holland will undergo Tommy John surgery on Friday.
Royals manager Ned Yost said Thursday that Greg Holland has a "significant" tear of the ulnar collateral ligament in his throwing elbow.
Greg Holland said Thursday that an MRI earlier this month showed that he has ligament damage in his elbow.
The Royals announced Thursday that Greg Holland will not pitch again this season.
Greg Holland won't get his ninth-inning job back this year.
Greg Holland will be unavailable for the next few days due to tightness in his right elbow.
Royals manager Ned Yost indicated Wednesday that the team will keep a close eye on closer Greg Holland.
Greg Holland escaped danger to earn the save Tuesday, working a scoreless inning against the Indians.
Greg Holland pitched a scoreless ninth inning against the Twins on Tuesday, earning his 30th save of the season.
Greg Holland (arm) yielded two runs on three hits in his return to the mound on Wednesday.
Royals manager Ned Yost said that Greg Holland (arm) will likely be available to pitch Wednesday.
Greg Holland might be unavailable to pitch Monday due to what Royals manager Ned Yost referred to as a "cranky" pitching arm.
Greg Holland earned his 28th save of the season in Saturday's 6-3 win over the Red Sox, though it came with a hit allowed and a walk.
Greg Holland struck out the side in Friday's 4-1 win over the Angels, earning his 26th save of the season.