Chen, Davis switch rotation spots for Nats

KANSAS CITY -- Royals manager Ned Yost altered his projected pitching rotation, flipping the assignments for left-hander Bruce Chen and right-hander Wade Davis.

Chen will start Friday night's series opener against Washington instead of Davis, who will start Saturday night's game. That positions Chen behind right-hander James Shields in the five-man rotation.

"I just want a lefty behind Shields. Now's the time to do it," Yost said, declining further explanation.