With catcher Jason Kendall out for the season, the Royals will turn to Brayan Pena and Lucas May behind the plate.
Kendall will undergo surgery Friday to repair extensive tearing of his right rotator cuff.
Pena, 28, made only his 15th start this season behind the plate Wednesday. May has never appeared in a major league game. He was drafted as a shortstop and was acquired in a July 28 trade from the Dodgers for Scott Podsednik.
"We get to see Brayan Pena," manager Ned Yost said. "And we get to see Lucas May and evaluate his talents and abilities behind the plate. He's a converted (infielder), so he's not going to be extremely polished. But he's a guy who has a chance to be a pretty decent receiver."
Yost is unsure how he will use the catchers.
"Pena will...