Diaz threw a scoreless ninth inning with two strikeouts and allowed no baserunners to record his 10th save in Friday's win over Toronto.
Diaz briefly lost the closer role in May, but has bounced back and looks locked in again as Seattle's stopper. In his last eight appearances, Diaz has converted all three of hsi save chances and allowed one run in nine innings with 10 strikeouts and two walks.