Kochanowicz will start Sunday's game against the Nationals, Rhett Bollinger of MLB.com reports.
With a rainout forcing the Angels into a doubleheader Wednesday, the team was in need of a starter for Sunday's game and recalled Kochanowicz from Double-A Rocket City to fill the void. The 23-year-old has made two starts for the Angels this season, surrendering 11 runs across seven frames. He isn't a recommended streaming option for Sunday.