Royals’ Salvador Perez out 4-6 weeks after freak knee injury Royals’ Salvador Perez out 4-6 weeks after freak knee injuryUSA TODAY Salvador Perez suffers grade 2 MCL tear after slipping while carrying luggageESPN Salvador Perez injury: Royals catcher out 4-6 weeks with Grade 2 MCL tearCBSSports.com Full coverage