 Complete the following phrase:  On December 12, 2018, the Reds traded Rainey to the Washington Nationals for Tanner Roark. Rainey was called up to the Nationals from the Class-AAA Fresno Grizzlies on May 18, 2019, and swiftly became one of manager Dave Martinezs go-to relievers. He earned his first career win in relief on June 1, beating Roark and the Reds at Great American Ball Park. In 2019 he was 2-3 with a 3.91 ERA in 52 relief appearances, as he struck out 74 batters in 48.1 innings 13.8 per nine innings. The Nationals finished the 2019 year with a 93-69 record, clinched a wild card spot, and won the 