Diaz allowed one hit in a scoreless inning while earning a save over Washington on Monday.
Diaz worked around a one-out single to pick up his 24th save of the year Monday. It was his first scoreless appearance since June 28 after allowing a run in each of his last two outings. The 26-year-old lowered his season ERA to 2.13 with a 58:19 K:BB through 38 innings. However, he's punched out just one batter over his last four frames.