The Arizona Diamondbacks are dealing with a potentially serious injury to ace Corbin Burnes, who left Sunday's game with elbow tightness.

The Diamondbacks are going to slightly rearrange their starting rotation, moving Corbin Burnes up to Sunday against the Nationals.

Diamondbacks starter Corbin Burnes turned in another strong outing in his most recent start, allowing three runs in seven innings against the Dodgers.

Burnes' trademark cutter has looked much more like the pitch he is known for, and the right-hander appears both confident and in control on the mound of late. The D-backs could use another lengthy start against a free-swinging Pirates team that has struggled offensively.