Diaz blew a save Sunday against Pittsburgh, allowing two runs on one hit and a hit-by-pitch over one-third of an inning.
The Reds took a 3-2 lead into the bottom of the ninth, but Diaz couldn't get the job done. After getting Rowdy Tellez to ground out to start the frame, Diaz hit Bryan De La Cruz with a pitch then surrendered a walk-off two-run home run to Yasmani Grandal. The 27-year-old closer is now 24-for-27 in save opportunities this season, and the outing pushed his ERA from 4.00 to 4.37.