Kelvin Herrera has been diagnosed with a slight flexor strain in his right forearm and is unavailable for Friday's contest against the Angels.
Kelvin Herrera (forearm) will undergo an MRI on Friday.
Kelvin Herrera exited Thursday's game versus the Angels with right forearm tightness.
Kelvin Herrera left Thursday's game against the Angels with an apparent hand injury.
Royals recalled RHP Kelvin Herrera from Triple-A Omaha.
Bob Dutton of the Kansas City Star reports that the Royals will recall Kelvin Herrera and Chris Getz from Triple-A Omaha prior to Friday's game.
Bob Dutton of the Kansas City Star was told by a club official that the Royals are considering calling up Kelvin Herrera in the next few days.
Royals optioned RHP Kelvin Herrera to Triple-A Omaha.
Kelvin Herrera took the loss on Tuesday, allowing three runs in just 1/3 of an inning against the Indians.
Kelvin Herrera allowed four runs, including three solo home runs, to the Braves on Tuesday.
Kelvin Herrera earned his second save of the season in closing out the Royals' 3-0 win over the Twins on Wednesday.
Kelvin Herrera earned his first save of the season Sunday in the Royals' defeat of the Phillies.