Mar. 28 3:49 PM PT4:49 PM MT5:49 PM CT6:49 PM ET18:49 ET22:49 GMT6:49 3:49 PM MST5:49 PM EST6:19 PM VEN2:49 UAE (+1)5:49 PM CT-Perez will miss up to six weeks after spraining the medial collateral ligament in his left knee when he missed a step while carrying a suitcase up stairs in his home. No surgery is required, and recovery can be as little as four weeks. Analysis: The injury occurred Tuesday night, when the club returned to Kansas City from spring training. The five-time All-Star heard a ''pop'' and immediately called Royals trainer Nick Kenney, who advised Perez to ice the knee and come in for an MRI exam on Wednesday. The exam revealed a Grade 2 sprain with a minor tear of the ligament. Drew Butera and Cam Gallagher are expected to share catching duties in Perez's place.