To do it, the Royals gave up outfielder Wil Myers, widely regarded as the top prospect in the minor leagues, and right-hander Jake Odorizzi, considered their top pitching prospect. They also sent left-hander Mike Montgomery and third baseman Patrick Leonard to the Rays for another player to be named or cash considerations.

Shields is a former All-Star who immediately slides into the top spot in the rotation. Davis will also join the rotation after spending last season in the Tampa Bay bullpen.