The Royals received some bad news late Tuesday afternoon when it was learned that catcher Salvador Perez will be out four to six weeks with a torn knee ligament.
He slipped on a step as he was lifting his suitcase, Perez said.
The injury is a Grade 2 tear of the medial collateral ligament, the team said.
The Royals open the season on Thursday at Kauffman Stadium against the Chicago White Sox.
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