Starting pitcher
Starting pitcher Jeff Niemann was placed on the 15-day disabled list on May 6. Outfielder Brandon Guyer was called up to take the open roster spot. In his first major-league at-bat, Guyer hit a home run, becoming the second player in Rays history to hit a home run in his first career at-bat. Guyer was optioned back to Durham on May 8 when the Rays recalled relief pitcher Rob Delaney.