Perez had to be helped from the field by Yost and the trainer after colliding with third baseman Cheslor Cuthbert while catching an Adam Eaton foul fly in the ninth inning of the Royals' 8-7 win over the Chicago White Sox on Saturday. The Royals rallied for seven runs in the bottom of the ninth to escape with the win.
The Royals will not place Perez on the disabled list for now, Yost said. Perez is hitting .277 with seven home runs and 25 RBIs in 46 games this season.
The team recalled catcher Tony Cruz from Triple-A Omaha on Sunday to serve as the backup for Drew Butera while Perez is sidelined. Cruz was hitting .278 with six doubles, three home runs and 20 RBIs in 31 games for Omaha this season.
The Royals have dealt with a rash of injuries. Third baseman Mike Moustakas and left fielder Alex Gordon collided last Sunday while chasing a foul ball and both landed on the disabled list. Gordon has a broken right wrist and is out 3-4 weeks, while Moustakas tore the ACL in his right knee and likely is out for the season.