SURPRISE, Ariz. -- The Royals have placed right-handed pitcher Jesse Hahn on the 60-day disabled list with a sprain in the UCL of his right elbow. The move was made on Tuesday when the club signed free-agent outfielder Jonathan Jay.
Now the Royals and Hahn will have to play a waiting game. The 28-year-old felt a twinge in his right elbow on Thursday during his last start.
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Hahn said he will be shut down for several weeks, then begin a throwing program and be re-evaluated.
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"They sent the [images] off for a second opinion," Yost said. "It's not to the point where they would just, I don't think, opt to do surgery."
Hahn, who had Tommy John surgery in 2010, felt a twinge Thursday similar to one he felt in 2015, when he missed the second half of the season with the A's.
"Very similar, except in 2015, I didn't speak up soon enough," Hahn said. "I tried to pitch through it. I made about five or six starts with a hurt elbow. I kind of learned from that mistake."

A good ribbing
Right-hander Nathan Karns made his first start this spring since having thoracic outlet syndrome surgery last May. He went 1 2/3 innings on Tuesday and threw 49 pitches while giving up one hit, three walks and no runs. Karns struck out three as the Royals lost, 5-4, to the Padres. Cheslor Cuthbert homered for the Royals.
"It was 10 months in the making," Karns said of his outing. "That was the biggest thing for me, just kind of get through that opportunity, no matter what happens. Just one more step toward our goal of being ready for the season. Very happy with it ... but it felt like I was in the World Series, the adrenaline was going. I had a little bit of the jitters, as I should. It's been a while since I've been out there."
Like so many before him, Karns kept the rib that was removed during his surgery (like Padres starter Christopher Young and Royals prospect Kyle Zimmer), and had it preserved as a souvenir.
"I'm trying to get it dipped in something, just kind of have it like coated in something and put it on a necklace," Karns said. "Just take it out there, so at least I'm always 100 percent on the mound, instead of 99."
Injury update
Outfielder Bubba Starling will be shut down for a few days as he deals with oblique tenderness. The Royals are being extra cautious with that injury because Starling's 2017 season was shut down in August because of an oblique strain.
Camp battles
Rule 5 right-hander Brad Keller continued to make a case for the roster by striking out three in 1 1/3 scoreless innings Tuesday. He has thrown three scoreless outings this spring.
Up next
Right-hander Jakob Junis will make his second start this spring as the Royals take on the Brewers at Surprise Stadium at 2:05 p.m. CT on Wednesday. The matchup will be available on Gameday Audio. Left-hander Foster Griffin and right-handers Kelvin Herrera, Brandon Maurer, Burch Smith, Scott Blewett and Mike Broadway are also expected to pitch.