Diaz took the loss Sunday against the Phillies, allowing one run on two hits and no walks with two strikeouts across two-thirds of an inning.
Diaz took the mound in the ninth inning with the game tied 1-1 but couldn't push the game into extra innings. Nick Castellanos logged a one-out single and then stole second base on a strike three to Alec Bohm. J.T. Realmuto provided the game-winning hit with a single to center field. The outing snapped a scoreless inning streak of 7.1 frames for Diaz. The 30-year-old closer has 18 saves and a 3.74 ERA across 45.2 innings.