Although plagued with a few injuries early in his career, Zimmermann has pitched several immaculate innings while working with the Nationals. In 2013, he had his first career shutout with a one-hitter against the Cincinnati Reds, which was the second straight one-hitter by Nationals pitching in the series, marking the first occasion since 1917 when a Washington team achieved that streak, and the first time since 1900 that the Reds were on the receiving end of a shutout. During that same year, Zimmermann was named to his first All-Star game but chose not to play due to stiffness in his neck. He finished the season with a career high in wins. Zimmermann is mainly a three-pitch pitcher; he throws a four-seam fastball, a slider, and a curveball although on rare occasions he throws a circle change to left-handed hitters. On September 28, 2014, Zimmermann pitched a no hitter, which was the first in the history of the Nationals.
