Royals catcher Salvador Perez has been sidelined after suffering a right elbow injury at a team workout on Wednesday, the club confirmed on Friday.
An MRI on Thursday revealed damage to Perez's UCL. He will travel to Los Angeles next week to get a second opinion on the injury.
The six-time All-Star could be out for significant time, according to ESPN's Jeff Passan. Perez could possibly need to undergo Tommy John surgery, which would likely keep him out of Kansas City's lineup until 2020.
Perez has been an integral part of the Royals' lineup since 2011.