"We think he's going to be OK," Royals manager Ned Yost said. "He was checked out yesterday. [Catching coach] Pedro [Grifol] was on the phone most of the night and so was [trainer] Nick [Kenney], talking to Salvy, talking to the trainers, and [Perez] felt much better.
"The MRI didn't show anything. But we'll get another one back here to double-check."
Perez, playing for Venezuela in the World Baseball Classic, was injured in a collision at home plate with his Royals teammate and backup catcher, Drew Butera, who was playing for Italy.