With his power-hitting prowess on full display down in the minors, 27-year-old prospect Luke Ritter has been making a strong case for his first opportunity with the Mets.
Dodgers right-hander Yamamoto was placed on the 15-day IL with tightness in the triceps of his pitching arm.
The Mets completed a three-game sweep and pushed their winning streak to five with an 11-6 victory over the San Diego Padres on Sunday afternoon at Citi Field.
The prized rookie pitcher is slated to undergo further testing after leaving Saturday's game after two innings.