Keep track of the Royals’ recent transactions and injury updates throughout the season.
Sept. 25: RHP Max Castillo recalled from Triple-A Omaha; RHP Collin Snider optioned to Triple-A
Castillo, 23, was recalled Sunday to start the Royals' series finale against the Mariners and final home game of the season. Castillo, whom the Royals acquired from the Blue Jays in July as part of the Whit Merrifield trade, has impressed each time he's pitched for Kansas City this year. He owns a 2.79 ERA across two starts for the Royals and has pitched in Omaha in between. Castillo's start Sunday allows right-hander Zack Greinke two extra days of rest before he starts in Detroit on Tuesday.
Snider, who faced four batters without recording an out in Saturday's loss, was optioned to make room for Castillo on the active roster, but the right-hander will remain with the Royals instead of finishing out the season this week in Omaha in case he's needed over the final two series of the season.
RHP Taylor Clarke (left oblique strain)
Expected return: End of September/early October
Clarke felt something pull during his Aug. 7 outing against the Red Sox and he was placed on the 15-day injured list two days later, retroactive to Aug. 8. The reliever had been performing well for the Royals, with a 2.30 ERA in his past 15 games, but will press pause on things as he rehabs. Clarke threw his first live bullpen session on Sept. 20 and said he felt good throughout the total of 15 pitches. After throwing another live session Sept. 23, Clark made a rehab appearance on Sept. 26 at Triple-A Omaha, pitching a scoreless inning, allowing one hit while getting one strikeout. (Last updated: Sept. 27)
RHP Josh Staumont (right biceps tendinitis)
Expected return: TBD
Staumont was placed on the injured list after feeling soreness in his right arm a day after he threw a career-high 42 pitches in 1 1/3 innings against the D-backs on Aug. 23. The right-hander, who has battled injuries and consistency all season, hadn't pitched in the four games before that, so he was fresh and said that he had "no qualms" about his high pitch count. But there were times when the pitches felt "uncomfortable," and he alerted the Royals the next morning. Staumont does not have a timeline for a return. (Last updated: Sept. 25)
LHP Angel Zerpa (right knee injury)
Expected return: Possibly by the end of September
Zerpa exited his start on July 26 against the Angels after tweaking his knee while fielding a bunt and was placed on the injured list a day later. The Royals said Zerpa has a small tear in the patella tendon in his right knee. He was transferred to the 60-day IL on Aug. 3 to make room on the 40-man roster after the Trade Deadline.
Zerpa was sent on a rehab assignment with Triple-A Omaha on Sept. 10. He's made four appearances since then, although he was removed from his last start after two-thirds of an inning because of left arm discomfort. (Last updated: Sept. 25)
LHP Jake Brentz (left flexor strain)
Expected return: 2023
Brentz had a full UCL reconstruction (Tommy John surgery) on his left elbow on July 21 in Dallas after being sidelined since April 29 with a left flexor strain. The lefty reliever had seemed to be making enough of a recovery in the early months of the season to go on a rehab assignment in early June, but he was returned two appearances later because of the same soreness in his elbow. The Royals determined he needed surgery, and a second opinion confirmed the same.
A typical recovery for Tommy John is at least a year, sometimes less for a reliever. (Last updated: July 22)
RHP Tyler Zuber (right shoulder surgery)
Expected return: 2023
Zuber was placed on the 60-day IL with a shoulder injury on March 16. The 26-year-old reliever came into the condensed Spring Training with shoulder soreness that was going to delay his progression from the start of camp. He had surgery in mid-May and will be out for the remainder of the season as he rehabs in Arizona. (Last updated: May 21)
SS Adalberto Mondesi (left ACL tear)
Expected return: 6-9 months, likely not until 2023
Royals president of baseball operations Dayton Moore announced on April 28 that Mondesi tore his ACL in his left knee while running the bases against the White Sox on April 27. The 26-year-old had successful surgery in the first week of May, so the road to recovery has begun. Mondesi is rehabbing in Kansas City and was transferred to the 60-day injured list on May 20. (Last updated: May 20)