Holland first experienced pain in the muscle last weekend, when the Royals played the Angels in Anaheim. After picking up his fourth save of the season in Friday's 6–4 win over the Oakland Athletics, Holland and the team decided shutting him down for about a week would be more optimal than having him pitch through the issue.
"It just didn't feel good," Holland said, according to MLB.com. "To be able to help us, I need to be able to pitch in back-to-back days.
"Luckily we have a deep bullpen."
The Royals, who lost to the A's 5–0 on Saturday, are also facing an injury situation with shortstop Alcides Escobar, who sustained a mild sprain to his left knee when A's third baseman Brett Lawrie slid into him during a play at second base in Friday's game. Escobar sat out Saturday's game and the team called up infielder Orlando Calixte from Triple A Omaha for depth.
- Mike Fiammetta