Eduardo Escobar had two home runs and seven RBIs, and the Arizona Diamondbacks’ pitching, including Seth Frankoff in his first major league start, subdued the visiting Washington Nationals 11–4 on Saturday night. Frankoff, a 32-year-old right-hander who toiled in the minors and professionally in South Korea, lasted 4 2/3 innings—matching his three relief appearances combined…