Kansas City Royals starter Danny Duffy has been diagnosed with a torn ulnar collateral ligament in his left elbow.

Duffy was put on the 15-day disabled list Monday, when an MRI
revealed the injury.

Right-hander Nate Adcock was recalled from Triple-A Omaha.

The Royals said Duffy is expected to get a second opinion on his
elbow from Dr. Lewis Yocum in Los Angeles.

Duffy (2-2) faced only three batters in the first inning of his start Sunday against the Chicago White Sox. After catcher Humberto
Quintero saw the left-hander shake his arm after a throw, manager
Ned Yost and a trainer visited the mound. Yost immediately made a
change when Duffy said his elbow was the problem.

The 23-year-old Duffy also experienced tightness in his elbow
last month.