Yamamoto allowed two runs on a walk and four hits over 5.2 innings Sunday, striking out nine batters in the loss to the Rockies. He did not factor in the decision.
The 23-year-old rookie set a new career high with the nine punchouts. The two runs he allowed came in the form of solo shots by Nolan Arenado and Charlie Blackmon. Yamamoto lowered his ERA to 4.31 with a solid 66:26 K:BB over 64.2 frames. He'll face the Phillies at home Saturday.