The injury bug is biting Boston once again.

J.D. Martinez exited the Red Sox’s series finale against the Kansas City Royals in the fifth inning Thursday with back spasms. Martinez had gone 1-for-2 through four innings, scoring a run.

Sam Travis entered the lineup in Martinez’ place.

This is the third time Martinez either has missed or left a game due to back spasms since April 27.

Thumbnail photo via Brian Fluharty/USA TODAY Sports Images