Here's some unfortunate news with which to put a bow on the work week: San Diego Padres right-hander Dinelson Lamet will undergo Tommy John surgery and miss the season.

Lamet first experienced elbow pain during his final spring outing. Initially, the Padres did not believe he had anything wrong structurally. He had resumed throwing before the pain forced further examination.

Lamet, 25, started 21 games last season for the Padres. He managed a 4.57 ERA (91 ERA+) while showing a promising fastball-slider combination. The belief among evaluators is he needs to improve his command and changeup in order to ensure a long-term place in the rotation.

Unfortunately, Lamet won't get to work on those facets of his game until 2019.